For as long as I can remember, you searched for images like
/search?tbm=isch&q=your+search+query
Now it's
/search?udm=2&q=your+search+query
This pisses me off! Everyone knows isch = image search but it is not clear at all what "2" is supposed to mean.
No idea but i think its gay and it pisses me off.
mm the 2 is supposed to mean image, because if you search udm=18 it will give you only results from forums (very useful), i think its a new format they made to classificate media?
Idk what the rest of the UDMs are