What use is a description tag that tells people to go to some website to read history about this object?

A note is used to inform other mappers about non-obvious information about an element, the author's intent when creating it, or hints for further improvement.
You can read a more extended explanation is at note=*

You added name:etymology:wikidata=Q3824836 pointing to Andy Kessler.
However, this feature has name=Riverside Skatepark. This is a mismatch between feature name and wikidata article.
Perhaps you meant you use alt_name:etymology:wikidata= tag.
This should be corrected to be consistent.
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Published using OSMCha: https://osmcha.org/changesets/145477900

A newspaper article about the death of a creator of this feature is NOT a valid value for the website= tag.
It is supposed to be the actual website of this feature, which is https://www.chelseamarket.com/
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/145472479

Swimming pools should be mapped to the feature that actually contain water, not pavement perimeter around it.
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Published using OSMCha: https://osmcha.org/changesets/145456697

Hello.
What is the purpose of this note= tag?
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Published using OSMCha: https://osmcha.org/changesets/145441366

A newspaper article is NOT a proper website= of a feature. You mean mention it as a changeset source tag, but it's most definitely not this club's website.
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Published using OSMCha: https://osmcha.org/changesets/145441167

This edit has the same problem as the previous one. This bike path is already mapped as tags on the roads.
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/145342951

Hello.
Please note that this changeset will be reverted in full since it goes against osm.wiki/One_feature,_one_OSM_element. All the features you added are already mapped as tags on Plaza Street West way.
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/145339377

Hello.
Rather than writing that as text description, why not add entrance nodes at appropriate locations?
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Published using OSMCha: https://osmcha.org/changesets/145313730

Hello.
Could you elaborate why did you delete building tag here?
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Published using OSMCha: https://osmcha.org/changesets/145312291

Hello.
You keep deleting and recreating features with identical tags. Why are you doing this? What kind of analysis involves deleting valid OSM features?
When you needlessly OSM features, you also delete their history, which can be useful in the future to refer to such an element.
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Published using OSMCha: https://osmcha.org/changesets/145307458

Hello.
Please note that other can proper names, all tag values must be in the lower name, so instead of "Black" it should be "black".
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Published using OSMCha: https://osmcha.org/changesets/145301277

Hello.
Could you please elaborate what are you trying to map here?
What is the meaning of "place:area_alternate=park" tag? This is not a normal tag used in OSM.

Based on the available satellite imagery, these appear to be tennis courts. Could you explain why did you not map them as such? Is the satellite imagery not accurate?
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Published using OSMCha: https://osmcha.org/changesets/145411110

These buildings have "addr:street=S Midland Ave".
That's incorrect.
The correct street name is "South Midland Avenue", fully spelled out.

Hello.
Please do not abbreviate street names. They should be fully spelled out. You can read more about this guideline at osm.wiki/Abbreviations

I'm pretty sure both iD and RapiD update that field wherever you switch imagery to include the ones you looked at. 🤔 Strange that it didn't update for you. 👍

Hello.
There's a confusion in names.
name=Ride Aid
name:en=Walgreens
Which one is it?
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Published using OSMCha: https://osmcha.org/changesets/145220165

Hello.
As documented in description=* this tag MUST NOT be used for advertising or promotional purposes.
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#REVIEWED_BAD #OSMCHA
Published using OSMCha: https://osmcha.org/changesets/145219892

Hello.
Instead of completely deleting such a POI and destroying the history of this object and making this address unsearchable, it's much better to use lifecycle prefixes as documented in osm.wiki/Lifecycle_prefix or at the very least delete only biz-specific tags, but leave address info alone.
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Published using OSMCha: https://osmcha.org/changesets/145190912