By default, if a post or page uses a title that’s already been used, WordPress appends a -2 to the end of the slug to prevent conflicts. Not only do duplicate titles cause conflicts, they’re not good for SEO. Developed by wallfa_hm, the Duplicate Title Validation plugin checks the title and displays a notice if it’s considered a duplicate.
I tried to publish a post with a duplicate title but the plugin prevented it from being published and saved it as a draft instead. This is a nice touch and forces the writer to use a unique title.
It’s not difficult to determine what the plugin is doing but the notices could be improved so they’re easier to understand. If you publish a lot of content, this plugin is an easy way to make sure each post or page has a unique title.