Few processors are often used as compressors. Compressors drop the volume of your audio when it gets louder than a predetermined threshold, which helps you tame loud peaks. This is especially important with drums, which can have extremely sharp peaks on hits.
The compressor threshold determines the level in decibels at which the compressor “turns on.” Setting a high threshold means the compressor will only activate when the signal gets really loud. Much of a drum’s snap and punch is found in the initial few milliseconds when the sound first hits. Nearly all compressors let you adjust the attack time.
Read more about this here: https://www.sweetwater.com/insync/compression-tricks-give-drums-instant-punch/