The tags are a light color because they are user made tags. Only the user who applied that will see it, unless an absolutely ludicrous amount of people apply the same tags.

I use user tags to mark games I've bought on other storefronts, 'Woke Garbage' for anything that looks cool but is really a trap, as well as a personal crusade to put 'Male Protagonist' on anything where you can make your own character (the same way Female Protagonist appears on all of em). I've yet to see any of those tags in the wild.