Yes. Every website needs an SSL certificate, no exceptions worth making. It enables HTTPS, which encrypts traffic between your visitor’s browser and your server so nobody in between can read or tamper with it.
- Encryption: keeps logins, forms and payment details private in transit.
- Authentication: confirms visitors are talking to your real server, not an impostor.
- Trust and rankings: browsers flag HTTP sites as “Not secure,” and HTTPS is a factor search engines weigh in organic rankings.
Check your address bar right now. If there’s no padlock, moving to HTTPS is the next thing on your list.
Key Takeaways
Websites without SSL certificates lose visitor trust, rank lower in search results, and expose data to interception, while HTTPS delivers encryption, authentication, and a measurable SEO advantage.
| Point | Details |
|---|---|
| HTTPS is baseline, not optional | Browsers flag HTTP sites as “Not secure,” directly denting trust and conversions. |
| Certificates enable three protections | Encryption, integrity and authentication all rely on the TLS handshake working correctly. |
| Choose the certificate to match the site | DV suits most small sites; OV and EV add verification for higher-trust industries. |
| Automate renewal, don’t rely on memory | Lapsed certificates, not hacks, cause most SSL related outages. |
| CantyDigital builds SSL into every site | Provisioning, HTTPS redirects and expiry monitoring are included in CantyDigital’s web builds. |
Table of Contents
- What is an SSL certificate, and why do websites need them?
- How does an SSL certificate actually work?
- Why do websites need SSL certificates?
- What types of SSL certificates are there?
- How do you get and install an SSL certificate?
- What happens if a website doesn’t have an SSL certificate?
- What security and performance steps come after installation?
- What should you expect from an agency managing SSL on your behalf?
- Need help getting HTTPS sorted properly?
- Sources
What is an SSL certificate, and why do websites need them?
An SSL certificate is a small digital file that proves a website is who it claims to be and unlocks encrypted communication with visitors. Technically, it’s a digital object built on public key infrastructure (PKI) that pairs a public key with verified identity details about the domain and, depending on the certificate type, the organisation behind it.
The certificate is what makes HTTPS possible. Without one, a browser can only connect over plain HTTP, meaning everything sent, passwords, credit card numbers, contact form entries, travels as readable text. Install the certificate and that same connection gets encrypted, turning the padlock icon on and the browser warning off.
One naming quirk worth clearing up:
- SSL (Secure Sockets Layer) is the original protocol, retired years ago for security flaws.
- TLS (Transport Layer Security) is the modern replacement and what every site actually runs today.
- The industry still says “SSL certificate” out of habit. You’ll also see it written as “SSL/TLS certificate.” They mean the same file.
How does an SSL certificate actually work?
Every time a browser connects to a secured site, it runs through a quick negotiation called the TLS handshake. It happens in a fraction of a second, but three things occur in sequence.
- Client hello: the browser contacts the server and asks to start a secure session, listing which encryption methods it supports.
- Server certificate: the server sends back its certificate, proving its identity and sharing its public key.
- Key exchange: browser and server use that public key to agree on a temporary symmetric session key, then switch to encrypting everything with it, because symmetric encryption is faster for bulk data.
The public/private key pair does the heavy lifting at the start. The private key never leaves the server, and only it can decrypt anything encrypted with its matching public key, which is how the identity check works.
What this handshake actually delivers:
- Confidentiality: data in transit is unreadable to anyone intercepting it.
- Integrity: content can’t be silently altered en route.
- Authentication: the visitor knows they’re connected to the genuine server, not a lookalike.
Why do websites need SSL certificates?
Four reasons carry real weight here: security, trust, search visibility and compliance. None of them are optional extras anymore.
On security, an unencrypted connection is an open door. Without TLS, an attacker on the same network can inject ads, scripts or malicious code into a page as it loads, even if your server was never breached. This isn’t theoretical. Public WiFi and compromised routers make on-path content injection a genuine risk for any HTTP site, no matter how small.
On trust, Chrome and other major browsers mark HTTP pages as “Not secure” directly in the address bar, which visitors notice immediately, especially on anything with a login or a form, making gym lead generation strategies vulnerable without proper SSL protection.
Pro Tip: Run your homepage through a free SSL checker before launch day. A misconfigured certificate throws the same warning as having none at all, and most owners only discover it when a customer complains.
On search visibility, Google and other search engines treat HTTPS as a ranking factor, so an HTTPS site has an edge over an identical HTTP competitor. That compounds with the trust signal: a site that looks legitimate tends to earn better engagement, which feeds back into rankings.
On compliance, if you take payments, PCI DSS requires encrypted transmission of cardholder data, full stop. If you collect personal information from EU residents or handle health data in the US, TLS is a baseline expectation under frameworks like GDPR and HIPAA, though meeting either in full involves more than just a certificate. That’s a conversation for a compliance specialist, not this article.
What types of SSL certificates are there?
Not every certificate offers the same level of assurance, and picking the right one comes down to what your site does.
- Domain Validated (DV): confirms you control the domain. Fast to issue, often free, fine for blogs and brochure sites.
- Organisation Validated (OV): verifies the business behind the domain too. Suits company sites that want a bit more credibility signalling.
- Extended Validation (EV): the strictest vetting, historically used by banks and larger retailers, though browsers no longer display the old green company-name bar that used to distinguish it.
- Wildcard: secures a domain and unlimited subdomains (
*.yourdomain.com) under one certificate. - Multi-domain (SAN): covers several distinct domains from a single certificate, handy for businesses running multiple brand sites.
For most small business sites, a DV certificate through a free automated issuer is genuinely enough. Save OV or EV for sites where the extra verification signals something customers specifically look for, like financial services.
How do you get and install an SSL certificate?
Getting a certificate live involves four steps, and how much of it you do yourself depends on your hosting setup.
- Choose a certificate authority (CA). Let’s Encrypt issues free, automated certificates and now secures a huge share of the web. Paid CAs like DigiCert offer OV and EV options with extra support and warranty coverage.
- Validate ownership. The CA confirms you control the domain, usually via a DNS record or a file uploaded to your server.
- Install the certificate on your server or through your hosting control panel.
- Test the connection to confirm the padlock shows and there’s no mixed content warning.
Most mainstream hosting providers now handle steps one through three automatically, which is genuinely the easiest path for a small business without in-house technical staff. If you’re managing a server yourself, Certbot automates Let’s Encrypt issuance and renewal from the command line.
Whichever route you take, build a renewal habit into your calendar:
- Set expiry alerts at least 30 days out, since most certificates run on 90 day or 12 month cycles.
- Automate renewal wherever the platform supports it, manual renewal is the single biggest cause of lapsed certificates.
- Keep the private key restricted to the server it belongs to, never emailed or stored in shared drives.
- Confirm the full certificate chain installs correctly, a broken intermediate certificate throws errors on some devices even when it looks fine in your own browser.
What happens if a website doesn’t have an SSL certificate?
The consequences show up fast and they compound. Visitors hit a “Not secure” warning the moment they land, and that warning measurably erodes trust and drops conversions, particularly on anything asking for personal details.
Underneath the warning sits a real network risk: unencrypted traffic can be read or altered by anyone with access to the connection path, from a dodgy public WiFi hotspot to a compromised ISP node. Search visibility takes a hit too, since HTTPS sites generally outrank identical HTTP ones.
There’s also a quieter cost most site owners never think about. Browsers restrict features like geolocation, push notifications and service workers to HTTPS-only contexts, so an unsecured site simply can’t use them. Add in payment processors and third-party integrations that refuse to connect to HTTP endpoints at all, and an HTTP-only site starts locking itself out of basic modern functionality.
What security and performance steps come after installation?
Getting the certificate live is step one. Keeping it working properly is an ongoing job.
- Force HTTPS site-wide with a redirect, so nobody can accidentally load the insecure version.
- Audit for mixed content, old image or script tags still pointing to
http://links break the padlock even on a secured site. - Enable HSTS (HTTP Strict Transport Security) to tell browsers to always use HTTPS for your domain, and consider submitting to the HSTS preload list for extra protection against downgrade attacks.
- Confirm the certificate chain resolves cleanly across browsers and devices, not just your own laptop.
On performance, the overhead people worry about is mostly outdated. HTTP/2, which requires HTTPS, actually speeds up page loads through multiplexed connections, and session resumption avoids repeating the full handshake on return visits. A CDN adds another layer of speed on top of that.
Pro Tip: Bookmark an uptime monitor that also checks certificate expiry. Most site outages caused by SSL aren’t hacks, they’re just a certificate nobody renewed in time.
What should you expect from an agency managing SSL on your behalf?
If you’re outsourcing this, ask direct questions before signing anything: Who holds the private key? Is renewal automated or manual? What’s the backup process if a certificate fails to renew?
A proper handover should include admin credentials, monitoring dashboard access and a written inventory of every certificate covering your domains and subdomains. Ongoing WordPress security work should fold certificate monitoring in as standard, not as a separate line item you have to ask for.
A quick word from Matthew
Every live site should be on HTTPS by default in 2026, no exceptions for “just a small brochure site.” The real risk isn’t the certificate itself, it’s letting renewal slip. Automate it and monitor it.
Need help getting HTTPS sorted properly?
CantyDigital builds this into every website project from day one, so you’re not left chasing a lapsed certificate months down the track. Where a general web host leaves you to sort renewals and mixed content warnings yourself, we set up automated renewal and monitoring as part of the build, not as an upsell later.
Our web builds include SSL provisioning, forced HTTPS redirects, mixed content fixes and ongoing expiry monitoring, the same checklist covered above, handled for you rather than left on your to-do list. We also fold certificate health into broader SEO essentials work, since HTTPS and technical SEO are tied together anyway. If you’ve got questions about what’s involved for your specific setup, our website design FAQs page covers the common ones, or you can reach out directly for a straight answer on what your site needs.
Sources
- Let’s Encrypt
