To enhance your sounds within the track, to add excitement, aliveness to it and to glue the elements and sections together, using sound effects is a no-brainer. Fallers, risers, sweeps, transitions, impacts and reverses will allow you to create exciting and smooth transitions. FX shots will help you add important details to your track. Ambiences will add character, by creating context. And ear candies will add that sweet, sparkly layer to fill in those empty gaps in your song, so it doesn't lack anything.