Tags, keys, Values, Road Reatures...

In the city where i live in, there are so many cases that a street includes residences, commercial places and businesses on both sides with each other. When editing, What is the most appropriate “value” i may give to the key “highway” in cases of this sort? and also what about the “Road Features…”? Thanks

I don’t understand what you mean by “Road Features”, but the setting of the highway tag will depend on how the road fits into larger scale traffic flows, together with how your government classifies roads. It could be primary, secondary, tertiary, unclassified, or residential. The last one only being used if through traffic is going no further than very nearby residential or service roads.