Security certificates are what show to users that your website is secure and it's safe for them to pass you personal information (for example their email address through a contact form).
More commonly people have security certificates for online shopping carts as they are taking credit card details from users online for an online store (https). However, since 2018 Google has given preference to secure sites in their search results so there's also a search results advantage to having SSL installed on your website.
Installing a Security Certificate
If you are using cPanel as your website control panel then in all likelehood you can use self signed certificates which cost nothing to install. However, you will have to renew these from time to time and here's how...
- Login yo your cPanel control panel (www.YourDomain.com/cPanel)
- Click on "SSL/TLS Status" (this will tell you if a valid certificate is installed and if it has expired when it expired)
- Put a tick in the box next to the domain(s) you want to issue an SSL for or alternatively just put a tick in the box at the top of the list of domains to select them all
- Click "Run Auto SSL"
- cPanel will now install SSL certificates on the selected domains for you.
The cPanel SSL service will also issue and automatically renew these certificates each year.
This will take a few moments to update but once done your site will be secure.