Utilities
Margin utilities are the easiest way to add some structure to forms. They provide basic grouping of labels, controls, optional form text, and form validation messaging. We recommend sticking to margin-bottom utilities, and using a single direction throughout the form for consistency. Feel free to build your forms however you like, with
s,
s, or nearly any other element. In the example below, we add .mb-4 class to provide a proper margin between two input fields.
https://mdbootstrap.com/docs/standard/forms/overview/#subsection-utilities