Certificates allow you to add the certificates that you possess to the website. You will be able to add your certificate as a picture. Further, you will be able to add a title, subtitle, description to describe your certificate. Moreover, you can change the colors and font size of the title, subtitle, and text of the certificate description.
Also, there is a Certificate Builder addon that allows you to create custom certificates, providing extended settings, and design options.
Example of the certificate: