> I have a super rudimentary understanding of what BGP is (it allows you to advertise addresses something something)
The TL;DR:
Yes, BGP allows you to advertise addresses.
Ergo, it is allows you to build resilience, i.e. you can connect to multiple independent ISPs and advertise the same addresses. Hence traffic will always be able to reach you even if one ISP goes FUBAR.
By the same token, it makes pretty much zero sense to have BGP on a home connection (or, in technical speak, a "single-homed connection"). Since really BGP is a zero-sum game on single-homed connections (no real benefit, much added complexity).
The TL;DR:
Yes, BGP allows you to advertise addresses.
Ergo, it is allows you to build resilience, i.e. you can connect to multiple independent ISPs and advertise the same addresses. Hence traffic will always be able to reach you even if one ISP goes FUBAR.
By the same token, it makes pretty much zero sense to have BGP on a home connection (or, in technical speak, a "single-homed connection"). Since really BGP is a zero-sum game on single-homed connections (no real benefit, much added complexity).