A POI is a Point of Interest. In this case, you deleted a postbox in front of numbers 3/4 Hammonds Ridge.

You also added a taxi rank with a 4 car capacity in the middle of the London Road/Jane Murray Way. Were this not sufficiently improbable on its own, the rank was supposedly called "Pleb Taxi Airport Runs" and operated by "Mr Plebby McPlebbington". I can only speculate as to your motives in including that mobile number several times.

OpenStreetMap is a live database and the addition of fictitious information is generally regarded as vandalism.
https://wiki.openstreetmap.org/wiki/Vandalism

Your changeset comment here was "Initial add with Bitcoin tags", which is an inadequate description of your edit.
https://wiki.openstreetmap.org/wiki/Good_changeset_comments