The best AI feature nobody uses is 'ask about this file'
Most people paste text into a chat. The better move is letting the model read the whole file and answer questions about it.
The feature that changed my week was unremarkable: upload a document and ask questions about it. Not 'summarize,' but 'what did they commit to on page four' and 'does this contradict the earlier section.'
People skip it because the chat box invites pasting a snippet, and a snippet loses the context that answers the question. The model with the full file sees the contradiction you would have missed.
I use it on contracts, long reports, and my own messy notes. It turns a file from a thing I skim into a thing I can interrogate, and interrogation finds the gaps skimming hides.
The flashy features get the demos. This quiet one does the work.