Allows HTML tags like <p> <br /> <a href="#" rel="author"> etc. in your author profiles Biographical Info field.

Forces removal of p tags on images. Some themes get weird with the p tags.

Adds an editor button that puts in an empty paragraph which won't get deleted when you save.

Avoid adding unwanted P (paragraph) tags for individual pages and posts.

WordPress automatically inserts p and br tags, but disables them in shortcodes.