Porto comes with Font Awesome 5 Icons, Simple Line Icons and Porto Icons that can be used in your website.
Font Awesome 5 Icons
Font Awesome is web’s most popular icon set and toolkit with and that is why we have included Font Awesome 5.7.0 with Porto. There are 1500 icons FREE for you to use when building your site. Font Awesome icons are 100% full vector based icons and social logos giving you perfectly sharp lines.