Matching EQ allows you to sort of "clone" the frequency spectrum of another track. EQs like the Fab Filter Pro-Q2 offer such a function. You basically create two audio tracks and let the EQ calculate the differences between the frequency spectrum of your work and the one of the other (eg. commercial) track. Then, these differences get sort of "added in" or "taken out" of your track, resulting in an overall appearence closer to the reference track, depending on your instrumentation.
Learn more about EQing and how to deal with it when mixing:
NEW PML 5h+ Course: Mixing A Track From Scratch in Ableton (with stock effects)
Keywords: louder sounds better trap, Matching EQ, Cloning the Frequency Spectrum, freqadditive EQ, subtractive EQ, frequency masking, boosting, cutting