People sometimes add a list of related keywords to a group description, writing, picture etc. to make sure that the content in question appears in the appropriate search results.
In some cases, people sometimes get a bit overzealous and add hundreds of keywords, oftentimes unrelated keywords, to increase the visibility of their group, writing, picture, etc.
As a result, members often find themselves scratching their head wondering why certain unrelated pieces of content are appearing in search results. Which, makes it harder for people to find what they are looking for.
Hence, if someone has added many unrelated keywords just to boost visibility, we remove all keywords.