As I mentioned, the way you mapped is not outright wrong. 🙂
However, the difference is that tennis court sizes are fixed and standard, while fenced area around it can be whatever size there is available. Also mapping specifically to the marked area would allow you to map multi-court situations more accurately, for example like here way/564451752 👍

Hello.
Please note that it's inappropriate to "test" on a live, production server.
If you want to experiment with something, please see osm.wiki/Sandbox_for_editing
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/115190289

Hello.
When mapping tennis courts, it's best to drawn to the actual marked tennis court itself, and less so to the surrounding fence. While the way you mapped it is not wrong, it's less accurate. 👍
You can read more about this here: sport=tennis
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Published using OSMCha: https://osmcha.org/changesets/115186969

Hello.
From what I understand you are trying to do in this other similar edits, is to give names to sidewalks and crosswalks.
The way you are doing it is not a commonly accepted way of handing that. As documented in osm.wiki/Sidewalks there are osm.wiki/Relation:associatedStreet and osm.wiki/Proposed_features/Relation:street ways of doing it. And otherwise, such wide-scale changes should really be discussed and accepted by the local mapping community.
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Published using OSMCha: https://osmcha.org/changesets/115184045

This whole chunk of roads could use some fixing what's a bridge, what's a tunnel, what's overlapping what..
It seems like your proprietary sources are more up to date than the publicly available satellite imagery. Perhaps you could take a stab at fixing those issues?
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Published using OSMCha: https://osmcha.org/changesets/115164174

Ah, alright 👍I thought maybe you dropped them without realizing there's easy way to make them straight line.

Hello.
Small suggestion regarding this edit. :) If you select multiple nodes and press S, it'll aligned them all to a line. It could be done with all these benches so that they look nice and straight rather than dropped by a drunk bomber😉
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Published using OSMCha: https://osmcha.org/changesets/115111661

Hello.
This is clearly a playground and not a schoolyard!
Description for this maproulette challenge state "Schoolyards are often incorrectly tagged as paved playgrounds, even though there’s no playground equipment." Satellite imagery here clearly shows there's playground equipment on site and there's no school attached to it.
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/114997632

Hello.
Could you please confirm if this whole giant area has a single address of 78 John Miller Way?
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Published using OSMCha: https://osmcha.org/changesets/114989703

It's about local community preference. It's about accuracy of facts.

It is just New York, not New York City.
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Published using OSMCha: https://osmcha.org/changesets/114929944

Perhaps consider using a better app such as vespucci or organic maps or osmand. They allow you to add more tags to clarify what you are editing.
Also rather than plopping a toilet tag in the middle of a huge block, consider adding appropriate tags to the macy's entry.
But if you can't do any of that, at the very least describe what you are trying to add in changeset comments so that other people fix it. "created a toilet" isn't very useful.

Hello.
Is this a public toilet or your private home one?
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Published using OSMCha: https://osmcha.org/changesets/114863319

Hello.
Can you please elaborate on what subway station did you map? AFAIK there are no subway stations on Nostrand and Lex
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Published using OSMCha: https://osmcha.org/changesets/114847535

Both Google Maps and Uber are copyrighted sources from which you can not take data into OSM.
Also neither of those are the authoritative sources of address information. Yes, they are very popular, it doesn't mean they are correct or accurate.
However, I'm leaving it up to you since you know that area better.

Hello.
You mapped road segments with "layer=-1", which means it's below ground level. That doesn't seem to be the case here.
Can you please elaborate on this?
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Published using OSMCha: https://osmcha.org/changesets/114751580

Tag "layer=-1" means that way is below-grade. Is that the case here?
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Published using OSMCha: https://osmcha.org/changesets/114740419

Hello.
Those street addresses are not valid. An address can not be on 5 different streets...
You can search nyc property database to see the official building address. All these properties are on Lane Avenue
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Published using OSMCha: https://osmcha.org/changesets/114736852

Hello.
Your changeset covers 4 states and contains almost 1000 changes. Could you please elaborate what kind of "small changes" these are?
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Published using OSMCha: https://osmcha.org/changesets/114711892

Your intention was correct 🙂, however the prompt was for the south-bound side, which doesn't have any sidewalks.

The path you are referring to is more of a just a parallel footpath rather than a "sidewalk".
Sidewalks can be mapped as tags of a road segment or can be mapped as separate ways parallel to the road segment. In the first case you'd tag it as "sidewalk=yes/no/left/right/both". In the second case you'd use "sidewalk=separate" to denote that it's already mapped separately. 👍