1. increased value with little or no change in cost/effort
Black Friday sales give you more bang for your buck
A 'buck' is an American slang word for 'dollar'. To get 'more bang for your buck' is to get value or a good deal in exchange for your dollar. This is an informal phrase you might be likely to hear in advertising or in colloquial conversation. Similar in meaning to ‘make your money go further’, ‘value for money’ or ‘a bargain’.