You can salsa dance better if you know the music. It will give you the advantage of knowing what comes next. Salsa music tells a "story" and you can synchronize your movements to the musical phrases of this story.
You'll notice that some of the moves and patterns you learn work better with the slow or fast parts of the music. Try and remember these parts and work them into the music at the most opportune times.
Knowing when the music ends also gives you the advantage of being able to add a hot dip at the end, or hit the last beat with your favorite move.
If you are still a salsa baby, you may not own a collection of salsa music. Get your hands on as much salsa music as you can and listen to it all the time. It will get you familiar with the musical phrases that appear in most all of the salsa songs. Search for popular artists like Hector Levoe, Marc Anthony, Tito Puente, and Celia Cruz.
You’ll come across some music that intentionally fools you into thinking that the song ended, only to start again 5 seconds later. It's funny to hear the whole room go "ohhh!" as they realize that they got tricked!