Super new here, why are my IP geolocation results sometimes inaccurate on my new lookup tool?

hey everyone, i'm super new here and just launched my first ip lookup tool, pretty excited but also a bit lost. the main thing is, the ip geolocation results often seem way off, like an ip address is showing up in a completely different city or even country sometimes. is this a normal thing for these kinds of web tools, or am i missing something fundamental about how ip geolocation data works? any thoughts would be super helpful. thanks in advance!