It is a reminder of the great Quality Assurance tool that works to improve the classification quality of grass features at germany. The tool called Grass&Green and in place since September 2015.
The tool is easy to use and help directly to improve OSM data quality and connected directly to your mapping profile on OSM. It is important for all mappers to spend time not only in putting and editing new data, but also to improve the old ones.
It gives you a full guide of definitions of each feature
Try Grass&Green, help us to identify which features that should be inherted in a "park", a "forest", a "meadow", or a "garden".