Each time you edit a page or a post and store the current draft, WordPress saves the current state as an additional revision. Those revisions allow returning to a previous version of your posts, e.g. in case you made a mistake while editing.
The number of revisions stored this way is not limited by default. Especially on larger pages or blog posts with frequent changes this leads to unnecessary growth of the WordPress database. Since I never used the revisions on my own, I was looking for a way to at least limit the number of revisions created while writing new articles.Read More “WordPress: Limit article and page revisions”