Edit button or tap to edit

1. What does Edit button mean?
2. How do I get rid of edit on my IPAD?

What does Edit button mean?

A longtime request from Twitter's user base, the edit button allows users to edit their tweets for up to 30 minutes after posting — something that could help users clarify or correct a mistake in their tweet, fix a small typo or add hashtags, among other things.

How do I get rid of edit on my IPAD?

Go to Settings. Tap Restrictions. Under Toolbar you will find the option to toggle Edit Mode ON or OFF.