LOL more like... im just like.. what are they exactly LOL are they like lists? does that mean can u make them? if so, how? im baby I don't really have the time to figure it out rn cause im in the middle of my work week and need to sleep but i keep seeing ppl talk about them

yes you can make your own (i just don't know how to do it yet, but if i come across tutorials I'll send them to you) basically feeds are niche TLs. people make them to filter out specific content: if you're a fixed shipper it can come in handy.