If your website still uses HTTP, you're losing visitors, trust, and Google rankings. HTTPS isn't optional in 2026 — it's the baseline expectation for every website. But what exactly is an SSL certificate, how does it work, and how does it affect your SEO?
This guide explains SSL/TLS certificates in plain English, shows you how HTTPS impacts your search rankings, and gives you a step-by-step plan to secure your site. Check your current SSL status instantly with our free SSL Certificate Checker.
85%
Won't buy from HTTP sites
95%
Of Google traffic is HTTPS
2014
Google made HTTPS a signal
Free
Let's Encrypt certificates
What Is an SSL Certificate? (In Plain English)
An SSL certificate (technically TLS certificate) is a small data file that creates an encrypted connection between a website's server and a visitor's browser. Think of it like a secure envelope — instead of sending a postcard anyone can read (HTTP), you're sealing your message in an envelope only the recipient can open (HTTPS).
When a site has an SSL certificate, the URL starts with https:// and shows a padlock icon in the browser address bar.
How SSL/TLS Encryption Works
The SSL handshake happens in milliseconds, but it's a sophisticated process. Click through each step to understand what happens when you visit an HTTPS website:
How SSL/TLS Works (Click Through)
Step 1: Client Hello
1 of 5
Your browser says "I want a secure connection" and lists supported encryption methods
HTTP vs HTTPS: Why the Difference Matters
HTTP (Not Secure)
- Data sent as plain text — anyone can read it
- Passwords and card details visible to hackers
- Chrome shows “Not Secure” warning
- Google ranking penalty since 2014
- Visitors leave — 85% won't buy from HTTP sites
HTTPS (Secure)
- 256-bit encryption — data is unreadable
- Identity verified — you're on the real site
- Padlock icon builds instant trust
- Google confirmed HTTPS as a ranking signal
- Required for Google Ads, payment processing
How HTTPS Affects Your Google Rankings
Google has been clear: HTTPS is a ranking signal. Here's what we know about how it impacts SEO:
Direct ranking boost
Google confirmed HTTPS as a lightweight ranking factor in August 2014. While not as strong as content or backlinks, it can be the tiebreaker between two similar pages.
User behaviour signals
HTTPS sites get lower bounce rates and higher engagement. Users trust padlock sites more, stay longer, and convert better — all signals Google measures.
HTTP/2 performance
HTTPS is required for HTTP/2, the faster web protocol. This means HTTPS sites load faster, improving Core Web Vitals — another ranking factor.
Chrome "Not Secure" label
Chrome marks all HTTP pages as "Not Secure" since July 2018. This warning scares visitors away, increasing bounce rate and hurting SEO indirectly.
Page Experience requirement
Google's Page Experience signals include HTTPS as a requirement. Without it, you fail this entire category of ranking factors.
Types of SSL Certificates
Not all SSL certificates are the same. There are three validation levels, each offering different levels of trust and verification:
DV (Domain Validation)
Free – £50/yrOV (Organisation Validation)
£50 – £200/yrEV (Extended Validation)
£100 – £500/yrCommon SSL Problems & How to Fix Them
Expired certificate
Set up auto-renewal with Let's Encrypt or your hosting provider. Our SSL checker shows exactly when your certificate expires.
Mixed content warnings
Your HTTPS page loads some resources (images, scripts) over HTTP. Find and fix all http:// URLs in your HTML, CSS and JavaScript.
Certificate name mismatch
The certificate doesn't match your domain. Ensure your cert covers both www and non-www versions of your domain.
Using TLS 1.0 or 1.1
These old protocols have known vulnerabilities. Configure your server to only allow TLS 1.2 and 1.3.
No HTTP to HTTPS redirect
Set up a 301 redirect from http:// to https:// in your server config or .htaccess file. Use our redirect checker to verify.
Check Your SSL Certificate Now
Don't guess whether your SSL is configured correctly. Use our free tools to check:
SSL Certificate Checker
Check expiry, TLS version, encryption strength & get a security grade
Website Speed Test
Full security audit including SSL, headers & HTTPS configuration
Redirect Checker
Verify your HTTP to HTTPS 301 redirect is working correctly
Heading Checker
Check your on-page SEO alongside security optimisation
If your SSL check reveals problems, our web development team can configure SSL certificates, set up HTTPS redirects, fix mixed content issues, and ensure your site meets all security best practices. Get in touch for a free security consultation.
