Some people want to list their house, but not yet. Maybe they still need to clean it out, or maybe they are doing some last minute repairs, or whatever.
They call a real estate agent to talk about listing the home in preparation for when they are ready to put it on the market.
Of course, the real estate agent does not want to miss the opportunity to list the house, simply because the owners are not yet ready, so they make suggestions, one of which might be to advertise it as "Coming (22 comments)