This looks like an improvement from your previous contributions. Some of these building footprints are very accurate and I could not have mapped them better myself. Others are slightly oversized or have needlessly complex shapes. 

Try mapping footprints slightly smaller than the roof you see in the imagery. Check if a simple shape accurately represents a building before choosing a more complex one. You can use backspace when tracing lines and areas to undo the placement of the previous node without having to draw fom scratch.

Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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            Published using OSMCha: https://osmcha.org/changesets/171748587
            