The term 'code' refers to the flight number that is used in flight schedules. Under a code sharing agreement participating airlines can present a common flight number for:
A lot of competition in the airline industry revolves around ticket sales (also known as 'seat booking') strategies. Travel agents have a preference for flights which provide a direct connection. Code sharing gives this impression. Computerized reservation systems (CRS) also often do not discriminate between direct flights and code sharing flights and present both before options that involve several isolate stretches run by different companies.