Why is it されてる and not されている？


[![enter image description
here](https://i.stack.imgur.com/DVo71.png)](https://i.stack.imgur.com/DVo71.png)

Is the verb used here される？ Is the progressive form often shortened to remove い
from いる？




Yes, as you thought, 案内されてる is a shortened form of 案内されている, a combination of
the verb 案内される in te-form + the subsidiary verb いる. When people use いる as
subsidiary verb, い is often dropped although people regard it as casual spoken
language.

