Streaming is when you drop and add players on a regular basis to fill a particular lineup spot based on short-term potential. Usually, players who are streamed are not consistently good enough to warrant a full-time roster spot. Instead, they're added by fantasy owners in search of production for only one or two weeks at a time, usually based on favorable matchups. This strategy is most commonly seen with defenses and kickers, but it can be useful for any position where you do not have an elite, must-start player.