Hello. Please save your changes in one area before moving on to another, to keep the changeset size small. Also, please use the changeset comment to describe what you changed and why; "changes" is not adequate. See osm.wiki/Good_changeset_comments for more examples.
Cześć. Proszę zapisać zmiany w jednym obszarze przed przejściem do innego, aby rozmiar zestawu zmian był niewielki. Użyj także komentarza do zestawu zmian, aby opisać, co zmieniłeś i dlaczego; „zmiany” nie są odpowiednie. Więcej przykładów znajdziesz na osm.wiki/Pl:Dobre_komentarze_zestawu_zmian

shop=chemist and amenity=pharmacy are two different feature types. The main store is shop=chemist and within it is a pharmacy counter, amenity=pharmacy. It was correct for them to be separate.

It's proper to duplicate tags across the building outline and relation, since not all data consumers support building relations. See osm.wiki/Simple_3D_Buildings#Building_outlines

OpenStreetMap is a map of objects that exist in the real world. Please don't add things that don't exist.

When you merge two objects, double-check that all of the merged tags are still correct. Many of the objects in this change now have duplicated names. Additionally, it isn't always necessary to merge a PoI and a building.

Welcome to OSM! The building=* key is meant for what the building was built as; if it was built as a house but re-used as an office, it should be "building=house". See osm.wiki/Buildings . In these cases it might also be better to map the business as a separate node. Also, "building=detached" is for houses that are not connected to other houses. Sheds should use "building=shed". See building=detached

You've deleted it. The map on the website just takes a bit to update.

You can follow some similar steps. Move the map to the area you want to edit, and click the edit button at the top of the page. In the editor, you should be able to click on the object you want to delete, and either press the "delete" key on your keyboard, or press "control" and "backspace," or right-click the object and select "delete."

Welcome to OpenStreetMap! I see you've mapped the neighborhood association as a house, which is a type of building, which isn't correct. I don't know if we have a way to tag neighborhood associations, since OSM focuses on physical objects rather than things like coverage areas. If there are signs on the ground delineating this neighborhood, then it could either be made a residential landuse or a neighbordhood boundary.

entrance=yes is meant for the door of a building, but it looks like they're connected to roads here, so if they are for underground parking, amenity=parking_entrance might be more appropriate

Especially for changesets covering a large area, please be more specific about what you changed and what source you used, for example, "Corrected speed limits by checking street-level imagery"

Just to make sure, you're using the street-level imagery available in the editor, like Bing and Mapillary, right? Google Street View isn't allowed to be used as a source.

It was correct before. Two separate traffic signs should be mapped as two separate nodes, even if they're on top of each other.

Freeway exits/motorway_links usually don't have an actual, hard speed limit/maxspeed. Rather, the yellow signs refer instead to maxspeed:advisory ("advisory speed limit" in iD).

Welcome to OSM! Please use more detail than "fix" in the changeset description--what did you change and why? For example, "Reclassified service road in SCUSD Farm." More examples here: osm.wiki/Good_changeset_comments Also, "unclassified road" is, confusingly, a classification, used for minor public roads. highway=unclassified I think "service road" or "track road" is better for farm roads.

Please make sure to save your changes in one area before moving to another, so that the changeset bounding box only covers relevant areas.

I think these still could have benefited from manual review. "16 Avenue Southeast Connector" is probably meant to be "16th Avenue Southeast Connector," for example, considering 16th Avenue is nearby.

The opening_hours in the previous version was correctly formatted, and means that it is open on Monday and Wednesday through Friday. Try the validation tool: https://openingh.openstreetmap.de/evaluation_tool/?EXP=Mo,%20We-Fr%2011:00-20:30;%20Sa-Su%2012:00-20:30

Previous versions of this object said it's open on Mondays, but it looks like you changed it to be closed on Mondays. Is that correct?

Please use the changeset comment field to describe what you changed and why. For example, "Added speed limits from signs in street-level imagery." More examples and guidelines can be found here: osm.wiki/Good_changeset_comments