My interpretation of Mask of the Wild is that players with this feature can hide in situations that other players can not. For example, a Wood Elf may attempt a stealth roll in heavy rain while other players may not, because it is too easy to see them without this feature. This is my interpretation, which is based on a bit of reading and more about RAW than advantages, etc.
Unfortunately, I have trouble finding ways to apply this feature in most circumstances. The feature only works in situations that are related to natural phenomena, so that cities, dungeons, ships, palaces, etc. are largely excluded from the function. But when I look at a forest, I realize that all players can try stealth checks by hiding behind trees easily enough. It seems silly to imagine a situation in which only one wood elf can hide, but not others (you are in a forest, but all trees are so thin that only one person with a mask of the wild can hide?).
It seems that Mask of the Wild is useful only when natural phenomena are not enough to hide the average player, but still enough to hide a wood elf (moderately tall grass, short bushes, very light forest, heavy rain or snow outdoor) spaces and moderate but not heavy fog outside the woods), which seems to be relatively limited. In addition, I would probably have to work hard as a DM to specifically create these kinds of situations for Mark of the Wild to be beneficial. I do not usually distinguish between forest and light forest or between tall grass and tall grass.
I lead a campaign in the jungle of Chult, which almost always gives every player the opportunity to hide, which makes things worse.
How does Mask of the Wild realize its benefits in practice? When is this a useful feature?
This question is different from the other question. How does the wood elf mask of the wilderness work in terms of taste? because it refers more to the mechanical advantages of the feature than to the taste.