Personally, I will not delete the data, of course, but a revision of the administrative structure should be considered, and the keys used should be known and interpretable by everyone. Is there a source for the (old and) new structure?

Hello! Please have a look on http://overpass-turbo.eu/s/2bws. What is the mean of the tag ض = residential. Did you mean building = residential?

Hello! Please have a look on node/13136319368.
What is the mean of the booth tags
Accueil téléphonique 24H/7J = 02 40 56 97 98
Urgence décès disponible 24H/7J = 3012
?

Hello! Please have a look on way/1221946311, node/12706330781. What is the mean of the two slash's before the keys?

Hello! Please have a look on way/1429046508. What is the mean of the tag building:min_part = yes?

Hello! Please have a look on way/1429066064. What is the mean of the key floor:count = 1? Is there any difference to building:levels?

Hello! What is the mean of the tag old_VDC=Sadi?

Hello! We use British English for our keys and definitely avoid spaces in the key. Incidentally, the key ref:FR:NAF has already been used 41,047 times. In my opinion, it is questionable whether a classification of the number of employees should be collected at all. In the school environment, there is information on the number of pupils and teachers, but here too, there are only numbers and no classifications. These can be added via the reference number if required.
Did you know the page hhtps://wiki.osm.org?

Welcome to OSM! Please don#T existing objects from the map. You can add acces=private for private streets.
I have already done it.

Welcome to OSM! Please move the camera on the correct side of the street.

Welcome to OSM! Please move restaurant The Manufactory to the correct building. (it isn't part of the street)

Welcome to OSM! I remove your speedlimit of 545 mph or 877.1 kmh. It's a bit too oversized for an asphalt road.

Welcome to OSM!
Please be careful! You moved the node node/6738898866 more than 100 meters over streets and buildings.
I moved the node back to the original position.

Welcome to OSM! Please be careful! You moved two nodes node/10010986741, node/10010986742 more than 100 meters over streets and buildings.
I moved the nodes back to the original position.

Welcome to OSM! Please note that there is no street with the specified address in the surrounding area.

Welcome to OSM! I didn't see any street Davis Road near by, you website has an error, the aerial image shows no building. Did you get the point right?

added!

Welcolme to OSM! Please notice the difference between a name and a description.
If you need more information (and cannot find any examples or ask anyone else), please visit our wiki at osm.wiki.

If this building is not just called that but actually contains a library, a tag amenity=library would be missing.

Welcome to OSM! Could you please add more information about your company?

Wrong comment: Add via node to u-turn restriction.