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What is an SSL certificate, and why does your website need HTTPS?

If your address bar says "Not secure", visitors see a warning before they see your business. An SSL certificate removes that warning and encrypts everything they send you.

Published 25 March 2026 6 min read

Close-up of a browser address bar showing a secure padlock and an https address

What an SSL certificate actually does

It proves your website is what it claims to be, and it encrypts the traffic between the visitor's browser and your server. Names, messages, passwords and card details travel as scrambled data instead of readable text.

When a valid certificate is installed, your address changes from http to https and browsers show a padlock.

Why HTTPS is no longer optional

Four practical reasons, in order of how quickly you will notice them.

  • Browsers warn visitors on pages without it, especially on forms.
  • Search engines treat HTTPS as a ranking signal.
  • Payment providers require it before they will process a transaction.
  • Modern browser features and analytics often refuse to work without it.

The certificate types, briefly

Most websites need only the first.

  • Domain validated: proves you control the domain. Issued in minutes, free with every plan.
  • Organisation validated: also verifies your registered business. Useful for finance and larger firms.
  • Extended validation: the most thorough check, with the longest issuance process.
  • Wildcard: covers every subdomain, such as shop.yourbrand.com and blog.yourbrand.com.

Turn on the padlock today

Free SSL is included with every hosting plan, and organisation-validated certificates are available when you need one.

How to install SSL on your site

On our hosting it is switched on for every domain automatically and renews itself. If you are moving from a site without it, add a redirect from http to https, then fix any images or scripts still loaded over http so the padlock does not appear broken.

Fixing a "connection is not private" warning

Nearly always one of these three.

  • The certificate expired and did not renew.
  • You are visiting a name the certificate does not cover, such as the www version.
  • The page mixes secure and insecure content.

Frequently asked questions

Is a free SSL certificate as secure as a paid one?
The encryption is identical. Paid certificates add business verification and warranties, not stronger protection.
Does SSL come with Ayuni Host hosting?
Yes. Every plan includes free SSL on every domain, installed and renewed automatically.
Will switching to HTTPS affect my search rankings?
Done properly, with redirects in place, it helps. HTTPS is a positive signal for search engines.

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