What Is an SSL Certificate
SSL encrypts data between server and browser. Shows a padlock icon in the address bar.
Why SSL Is Mandatory
Browsers mark HTTP sites as "Not secure". Google uses HTTPS as a ranking factor. 85% of users avoid purchasing on non-HTTPS sites.
Get SSL for Free
Let's Encrypt offers free certificates. GitHub Pages provides automatic SSL for custom domains.
SSL Types
DV (free), OV (company verified), EV (green address bar). DV is enough for most sites.