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
As far as I got before getting bored:
1 - all
2 - image
6 - learn
7 - videos (also tbm=vid)
13 - news (also tbm=news)
14 - web
15 - attractions
18 - forums
24 - mystery
26 - also videos? And social media????
28 - shopping (also tbm=shop)
37 - products
38 - videos, but 0 results