Buy the SSL certificate that matches the coverage you actually need
An SSL/TLS certificate enables HTTPS by authenticating the certificate subject and encrypting traffic between visitors and the website. The right certificate is determined primarily by what hostnames must be covered, the validation/service model you want, and whether your hosting already includes suitable SSL.
Use the live product cards above for current pricing and checkout terms. Avoid buying a separate certificate until you have checked what your hosting plan already provides.