Welcome to OSM
You have added a farm in the middle of a road. I expect that a farm will on the land at one side of the road. We are very fussy about copyright, taking stuff from a web site without permission is not the best.

Welcome to OSM

I think you may have been trying out the editor and saved it by mistake. Even the lovely Liverpool doesn't have a desert on the outskirts. Would you like me to revert (undo) your edit?

If you want to see the map without the trees, render your own map and ignore the trees, don't delete them!

http://switch2osm.org

Just add what you feel you want to. More detail is good but if you make a mistake it can always be changed later. Any buildings you want to add create a lot of context for other features.

However, be careful.

Editing can be addictive!

Also, has the fire station now been turned into part of the green space?

Welcome to OSM

Thanks for the new details. I see you have added parks. Not everything that is a green space gets tagged as a park. The sports fields in particular are probably better tagged as a recreation ground. The individual pitches can then be drawn and tagged as leisure=pitch with a sport=xxxx tag to describe the kind of pitch.

HTH

Ye olde white hart was already in the map.

Welcome to OSM

You seem to have tagged the end of a road as Black Cat Motorcycles. I suspect that business isn't on the road, but in one of the buildings around the road. You might like to add a point to where the business really is and add the business details to that.

HTH

I suggest that the footway joins Delamere road, so it should join the road by sharing a point on it. This allows router software to suggest a walking route using your new path.

HTH

Welcome to OSM
We generally don't add footpaths beside roads as separate entities. We use the sidewalk tag on the road to describe them instead.

Welcome to OSM

The landuse=farm tagging you have removed is rather out of date because it was ambiguous. We now use landuse=farmland for example on fields, both arable and pasture. We use landuse=farmyard for the area around farm buildings.

HTH

Welcome to OSM

You seem to have added a blank point in London, England. Was this a mistake? Would you like me to remove it?

Welcome to OSM

You've added your business at the end of a road, whereas I expect you business will be in one the buildings alongside the road. If you need any help, please ask

Has the footpath you changed to be a road really been converted to a road?

Welcome to OSM

If this is a play area, maybe a better tag would be leisure=playground

The line you have draw is intended to be a footpath, from your edit comment. You need to add tags to describe it - probably highway=footway. Footpaths are connected to other routes, such as the roads. This allows routers to describe routes using the footpath.

If you need help, please ask

Welcome to OSM

You seem to have added an area, but you haven't any tags to describe what the area is. It could be a park, a car park, a construction site ...

If you need any help, please ask.

Welcome to OSM
You seem to have added a tourist viewpoint over a house. Would you like some help with this?

Welcome to OSM.
I'm not sure what you are trying to add. You have added areas, but without any tags to describe what kind of object it is. Is it a building, a car park, a building site ...?

Welcome to OSM
You have added a couple of pedestrian ways. In the UK pedestrian roads are usually in urban areas, such as a pedestrian shopping street. I think you may mean highway=footway