HTTPS & Website Security
Securing your website with SSL/TLS encryption to protect user data and satisfy Google's ranking requirements.
The Definition
HTTPS (Hypertext Transfer Protocol Secure) encrypts data between a user's browser and your web server using SSL/TLS certificates. Website security for SEO also includes proper security headers (HSTS, CSP, X-Frame-Options), mixed content prevention, and certificate validity monitoring.
Why It Matters
HTTPS has been a Google ranking signal since 2014. Browsers flag HTTP sites as 'Not Secure,' which destroys user trust. Beyond rankings, security vulnerabilities can lead to your site being flagged as malicious and removed from search results entirely.
Best Practices
Redirect all HTTP URLs to HTTPS with 301 permanent redirects — do not serve content on both protocols
Implement HSTS (HTTP Strict Transport Security) headers to prevent downgrade attacks and enforce HTTPS
Audit for mixed content issues where HTTPS pages load HTTP resources (images, scripts, stylesheets)
Monitor SSL certificate expiration dates and set up automated renewal with Let us Encrypt or your CA provider
Add security headers: Content-Security-Policy, X-Content-Type-Options, X-Frame-Options, Referrer-Policy
Ensure internal links and canonical tags use HTTPS URLs, not HTTP
Mistakes to Avoid
- 1
Letting SSL certificates expire, which shows browser security warnings and immediately destroys user trust
- 2
Not updating internal links from HTTP to HTTPS after migration, creating unnecessary redirect chains
- 3
Missing mixed content issues where secure pages load insecure resources, triggering browser warnings
- 4
Forgetting to update canonical tags, sitemap URLs, and hreflang tags to HTTPS after migration
Audit Checks
How Digispot AI identifies and fixes related issues
The site is served over plain HTTP, not secure HTTPS.
Impact: Browsers flag HTTP sites as "Not Secure", visitors lose trust, and Google favors HTTPS.
Install an SSL certificate (many hosts offer free Let's Encrypt). • Redirect all HTTP traffic to HTTPS. • Update internal links to HTTPS.
A secure HTTPS page loads some resources over insecure HTTP (mixed content).
Impact: Mixed content reduces security and triggers browser warnings or blocked resources.
Update all resource URLs (images, scripts, styles) to HTTPS. • Find offenders in the browser console. • Re-test that the page loads with no warnings.
The site doesn't send an HSTS header, which forces browsers to always use HTTPS.
Impact: Without HSTS the site is vulnerable to attacks that downgrade visitors to insecure HTTP.
Add a Strict-Transport-Security header with a sensible max-age. • Make sure the whole site already works on HTTPS first. • Consider adding includeSubDomains once confident.
The SSL certificate is self-signed and not issued by a trusted authority.
Impact: Browsers show a full-page security warning, blocking users and destroying trust/indexing.
Install a certificate from a trusted CA (e.g. a free Let's Encrypt certificate).
A secure page has a form that submits data to an insecure HTTP address.
Impact: Data sent through the form can be intercepted in transit, a serious privacy risk.
Change the form action to an HTTPS URL. • Use absolute HTTPS paths on secure domains. • Re-test the submission is secure.
Your SSL certificate has expired or expires within 14 days.
Impact: An expired certificate makes browsers show a full-page security warning that blocks visitors.
Renew the SSL certificate now. • Enable auto-renewal to prevent recurrence. • Verify the new certificate is valid in a browser.