Make a long story short

Generated image of a woman summarising a book
You might say to make a long story short when you are giving a brief summary of a longer explanation. The speaker skips many details and goes straight to the main point.

The phrase became common in English conversation as a way to signal that the full story is being shortened, so the listener is prepared for a quick conclusion.

To make a long story short, Fred messed up and we missed the concert.