If something is advantageous, it helps you and makes it more likely that you will do well. People say it about a situation, a place, a deal, or a position: an advantageous location, an advantageous contract. You almost never call a person advantageous; you say they are in an advantageous position. It is a little formal. In everyday talk, people more often say helpful, useful, or that's good for us. School and business writing like this word. Though actually, advantageous does not mean fair — it only means it helps one side. A deal can be advantageous to a company and still be hard on everyone else. There is also a quieter use: it would be advantageous to wait simply means waiting would help.