Confused on BRRR method. Help?

[Aaron A.]

Hi everyone! This is my first time posting after snooping around for a few months.

So I bought my first duplex last May and am living in one side and renting out the other which covers about 3/4 of my mortgage (taxes insurance and such all rolled in) I used an fha loan. I was wondering how the refinancing portion works exactly? I’ve tried looking but I’m still not quite sure. I wanna invest in more properties around me and just need some guidance. I get the buy-rehab-tent- refinance. Just having trouble understanding the refinancing aspect of it. Would anyone like to explain how that works? Thank you!