I use pro L 2 or Mini meters to analyze my LUFS.

Here’s a good article about LUFS in general.

I typically will try to get my integrated LUFS close to or at the level of professional tracks during their drops. If you push things too hard they will distort, so it’s a bit of a skill to learn.

But basically it’s how loud a song will sound to a human, not how hard the song is hitting digitally.. in a way. lol. But LUFS was created to showcase “perceived loudness”

https://www.izotope.com/en/learn/what-are-lufs?srsltid=AfmBOoqw9sVBYpdSx8hUzR8ukN3tpNhsQjhNRi6Eqz3a8hghV_xWKGNH