Why do some say you can only get pregnant during ovulation but others say you can conceive at any point during your cycle?

I didn’t grow up with great sex education, if hardly any at all, so a lot of my education comes from, well, googling to be honest and google can yield very conflicting answers.

For example, if you are looking up how to get pregnant, it will usually say that you can only get pregnant during your ovulation period. However let’s say you looked up what days to have sex to NOT get pregnant and there will be results that say you can technically conceive on any day of your cycle.

I don’t know, I guess it’s just confusing to me. My cycle is usually 28-30 days and I know that the length of cycles vary from person to person so that may be why answers vary but I am unable to take BC due to health reasons so I’d just like to be as informed as possible :) I really appreciate any explanations in advance!

Why do some say you can only get pregnant during ovulation but others say you can conceive at any point during your cycle?