Tutorial: How to add information to Open street map

Let's say you would like to use Gismo to automatically find some types of buildings. Office buildings or Restaurants, Casino or Ambulance station.
Gismo extracted the data from Openstreetmap.org and generated their 3d shapes, but couldn't find what some of their types are:

This happens due to lack of Openstreetmap.org data attached to that building geometry. This data is called a "tag". A tag consist of two items connected with = character.

For example, an office building would have the following tag: building=office.
Residential building tag would be: building=residential
Ambulance station: emergency=ambulance_station
The building, with 10 stories/floors would have a tag: building:levels=10

If you know that some building is an office building, a residential building, an ambulance station or anything other than that, you can tag that building by yourself. This is the beauty of the Open street map: any user with internet connection can add the content to the Open street map for free! Once you add the content (a tag/tags) Gismo would instantly be able to use it! Like this:

Here is a 5 minute tutorial on how to add a tag to a specific building at Openstreetmap.org.

Warning: adding tags and geometry to Openstreetmap.org is highly addictive activity! Use at your own risk!