Keyword cannibalization happens if two pages within one website target the same keywords. You're basically competing with your own website.
It's not likely Google will include both those pages in the SERPs. Therefore, it's often a good idea to see if you can fix this cannibalization.
Sometimes it helps to merge the 2 pages into one great page. Othertimes it may be better to remove one of the pages and redirect it to the other, or change the focus of one of the pages to a different article.Back