OpenStreetMap community

I'm quite new to OSM mapping myself, but I found following flow working for me - while out, I create a note via Street Complete reminding me to add something (stairs, bench, wastebin), maybe take a photo and attach it to the note for reference, and later, when I get home, I add the thing in openstreetmap.org editor. Last step is to "resolve" the note I created.

I only tried this once or twice a few days ago, I'm still not sure it's a good idea, maybe it's discouraged to "spam" notes like this, and also I don't know how long the attached photos stay hosted, increasing hosting costs to whoever pays the bills.

Yes, this is one way. But you can use StreetComplete's overlay feature (since release https://github.com/streetcomplete/StreetComplete/releases/tag/v57.0) to directly add benches and trash cans. This helps in avoiding to flood the note system with very small map features. When the overlay feature was not implemented i also added a lot of notes or benches/bins, but got a lot attention of other mapper because of this. So i switched to using OSMTracker to take notes. But i am a very happy user of the new things overlay.

Adding stairs is also possible, but a bit more complicated, so adding a note is fine.

Do you know this overlay feature already? This is definitely worth to check out.

You can also add those (and many more) with https://mapcomplete.org . This is a different app (or rather) a website, which was inspired by streetcomplete

I'm not an expert, but if you press the layer button next to the three stripes on the top right corner, you can choose between different map layers - the second to last option has a green dot icon and is probably called something like "objects" (I'm using the German version, so I don't know what the option is called in English). Then, after choosing a spot and pressing the plus button on the bottom left, you can add various objects like benches, trash cans, trees etc. yourself without having to leave a note for someone else to add it. But I think StreetComplete can only add little objects and metadata to already existing things, so for creating completely new streets, stairs, buildings etc. you have to use another OSM editor.

No idea. But this looks like fun