Bootstrap uses a responsive grid system that makes it easier to put elements into rows and tell each element's relative width.

Note that in this illustration, the col-md-_ class is being used. Here, md means medium, and _ is a number specifying how many columns wide the element should be. In this case, the column width of an element on a medium-sized screen, such as a laptop, is being specified.

<div class="row">

  <div class="col-xs-4"><button class="btn btn-block btn-primary">Like</button></div>
  <div class="col-xs-4"><button class="btn btn-block btn-info">Info</button></div>
  <div class="col-xs-4"><button class="btn btn-block btn-danger">Delete</button></div>

</div>