how to make a form group in bootstrap code example

Example 1: div class="form-group"

<div class="form-group"></div>

Example 2: form group

<div class="form-group bmd-form-group">
  <label class="bmd-label-static">Fist Name</label>
  <input type="text" class="form-control" placeholder="Your name here">
</div>