Wells can be used within Bootstrap to create an inset look to a pseudo panel. They appear kind of like panels, but without the chance to color them.
Instead, you have text that is inset from a box when you use the
well class to a div. This can be used as a overly simple panel if you need it to be. For example, you can create a basic well with something like:
<div class="well">Text inside a well.</div>
There are not a lot settings that you can apply. Mainly, you can change the amount of spacing that insets your text.
This could be to make the space larger, or smaller with the
well-lg class for more inset space or
well-sm for smaller inset space.
<div class="well well-lg">Element with a large well. More space to inset.</div> <div class="well well-sm">Just a small well. Less inset space.</div>