You are at the index page of the available features/Block Types "Bootstrap Blocks" has. On the left (for mobile at the bottom of this page), you will find links to the available Blocks within this concrete5 Add-On. Each page has a lot of examples and will show what each block can output to your visitors. Resize the screen, click anchors, click buttons, watch videos, try everything! No custom scripting is needed to output the generated examples (assuming the full Bootstrap CSS & Javascript is being used).
So go ahead, start with "Alerts" or the oh-so-powerful "Buttons".