HTTPS encrypts the connection between a visitor and your website. Without it, information sent through your contact forms can be read or altered by anyone positioned between the visitor and your server.
It protects your visitors
Names, email addresses, phone numbers and messages submitted through your forms deserve protection. HTTPS keeps them private in transit.
It protects your reputation
Modern browsers label sites without HTTPS as "Not secure". That warning undermines trust before a visitor has read a word.
It supports search visibility
Search engines favour secure sites, and many modern browser features only work over HTTPS.
It is affordable
Most hosting providers now offer free certificates through services such as Let's Encrypt, often enabled with a single click in the hosting control panel. Once enabled, redirect all traffic to the HTTPS version of your site.