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 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: