Revisions in WordPress are the backups of your content that are created automatically each time you make a change to a post or page. These backups allow you to revert to an earlier version of your content if needed.
Revisions allows you to see the changes you made to any post type on your WordPress site. It helps to prevent losing data or get a backup if anything goes wrong.
WordPress saves revisions as separate drafts in your database, and you can access and restore them from the post or page editor screen. Revisions can be especially useful if you accidentally delete content, make a mistake, or if someone else makes unwanted changes to your site.
You can also limit the number of revisions WordPress saves, or disable them entirely if you prefer. However, revisions are a powerful tool for managing and editing your content and are often very helpful in keeping your website running smoothly.