Enhanced odds are probably the most common football betting offer for old players, and can be found at many bookmakers regularly. Many bookies listed at Bojoko in fact offer enhanced football odds every day or at least every week, so always keep an eye out for the “promotions” page at your bookie of choice.
Enhanced odds are quite simply higher odds than what you would find for the same market generally, and they are often announced to much fanfare on the front page of a bookie as well. Sometimes they are in the welcome package as well, such as with LeoVegas, where all new players get 100% enhanced odds for their first bet.