The .form-group class is the easiest way to add some structure to forms.
Its only purpose is to provide margin-bottom around a label and control pairing.
Use the .form-inline class to to display a series of labels,
form controls, and buttons on a single horizontal row.
Use Bootstrap's predefined grid classes to align labels and groups of form
controls in a horizontal layout by adding .form-horizontal to
the form. Doing so changes .form-groups to behave as grid rows,
so no need for .row.