Bulma is a addon for HTML code that adds premade elements that already look good in a project.
Making normal HTML elements look good requires extensive styling work in a CSS file, Bulma speeds this up using custom elements that can be used to make decent looking webpages really fast, at the cost of a bit of customization
You can add Bulma to a website by adding the following link to the top of your page header
link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@1.0.2/css/bulma.min.css"
Font Awesome
Font Awesome is another addon for HTML code that adds icons that can be used in buttons, text, and more
It can be added just like Bulma using this link in the head of your page
link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css"
Icons can be added using span class="icon", and then i class="[icon name]"
You can find icons and their codes at font awesome website