the.com/takeaway

means The main point or lesson you walk away with from a meeting, article, or experience — or, in British English, food bought cooked and carried home to eat.

from A straightforward compound of 'take' and 'away,' first used in Britain for food you take away from the shop rather than eat there — a label as literal as the bag it comes in. The figurative sense, 'the key point to take away from this,' grew out of that same logic in the 20th century: whether it's a box of noodles or a conclusion from a meeting, a takeaway is simply the thing you carry off with you when it's over.