It means that you dont experience sexual attraction towards anyone of any gender identity. You can still enjoy having sex or have a sex drive, but you arent specifically sexually attracted to your partner. There are asexuals like me who just aren’t interested in having sex, though.
There are other asexual identities, such as demisexual, which means you don’t experience sexual attraction unless you are emotionally close to someone, or grey-asexual, which means you are only very rarely sexually attracted to someone. But thats not exactly the same as asexuality, just under the asexual umbrella.
This is seperate from a romantic orientation, which is who you are interested in having a romantic relationship with, and from aesthetic attraction, which is finding someone beautiful/handsome/nice to look at.
I hope that explains it. I’m open to answering any questions, as long as they aren’t offensive. I’m a pretty open person, and if more people talked about asexuality, I would have heard about it sooner and not spent so much time feeling confused and broken. So maybe someone whose asexual and doesnt know it will read this and understand themselves a bit better.