Hi O., please use key="email" not "@". Thanks, Alex

Hi PavelPS, please follow the OSM wiki and write wikipedia="lang:Name" (no https:..)
osm.wiki/Key:wikipedia#Examples
Thanks, Alex

Hi bermiego, amenity=hotel is wrong, please use tourism=hotel. Thanks, Alex

https://taginfo.openstreetmap.org/reports/key_lengths
then click on the key, and then on overpass or level0 to get the object. If you need further help, I will be there. Alex

Hi Lübeck, I removed your broken tag <empty>=yes from node/4741360838.
KR, Alex

Hi Lübeck, please do not create empty keys like <empty>="9:00-18:00" (node/4741224651). KR, Alex

Hi Seandebasti, please avoid tags like "3=canal" (way/481148650). I changed this undefined tag to a note. KR, Alex

Hi dufekin, often (>100 changeset last year) you insert the invisible char (0x7F) into ways in USA. The only purpose of this ASCII is to be ignored. Different OSM tools handle it different and it causes sometime visible Artefacts (if e.g part of name tag) or the tags are not useable, because DB cannot handle it (e.g. overpass-turbo). Please try to avoid this. Depending on used editor you cannot see it, but ID is able to show it. In this changeset, you put it into "ref" value.
About 99% of 7F in USA are made by you! Please try to avoid it. Thanks very much, Alex

Hi DenisJu, in node/4730280996 yoe put wikipedia=1160. I assume you mean ele=1160. KR, Alex

Hi EzekielT, please follow the OSM wiki (wikipedia="lang:Name"). see osm.wiki/Key:wikipedia
Thanks, Alex

Hi g., please follow the OSM wiki, wikipedia="lang:Name", relation/7077614.
osm.wiki/Key:wikipedia#Examples
Thanks, Alex

Hi vihiker27, what means key="+" ?This seems to be a Typo (as this key is unique on the planet). KR, Alex

Hi w., what means "2=level_crossing" in way/479778224 ?
Please fix. Thanks Alex

Hi 4b696d, why do you added the designation tag to an airport in spain (relation/2614519) ?
OSM wiki tells its a higway-tag!
osm.wiki/Key:designation
Could you explain what was your intention OR fix it?
Thanks, Alex

Hi vigneron, please wollow OSM wiki (wikipedia=lang:Name), see osm.wiki/Key:wikipedia#Examples
Thanks, Alex

Hi bermiego, please follow the rules from OSM wiki (wikipedia=lang:Name), see osm.wiki/Key:wikipedia#Examples
Thanks, Alex

Hi Weltstaat, what means #=yes ? Could you fix this for way/334711024 . Thanks, Alex

Hi Schönberger, please follow the format described in osm.wiki/Key:wikipedia#Examples .
wikipedia=lang:Name (not http..).
Thanks, Alex

Hi aromatiker, please follow the format described in osm.wiki/Key:wikipedia#Examples .
wikipedia=lang:Name (not http..).
Thanks, Alex

fixed/removed type (not typo) of node