This is the 11233rd most frequent German word.
sieh
"Sieh" is the imperative form of "sehen," meaning "see" or "look."
Here 'Sieh' is used as an imperative directed at a singular 'you', functioning as a command or request to look at something.
Sieh mal, ein Vogel auf dem Baum.
Look, a bird on the tree.
In this context, 'siehst' is derived from 'sehen', used here in the subjunctive form to indicate a condition.
Wenn du genau sieh(s)t, bemerkst du die kleine Statue.
If you look closely, you will notice the small statue.
This use of 'Sieh' is also an imperative, but it is directed reflexively, asking the listener to look at the picture themselves.