I don't know the species, but they are often referred to as "pest snails" as the common name. They are generally harmless but they can cause your tank to look unsightly if there's a lot of them on the glass. But they actually eat leftover food and things, so unless they are a real problem, I would just ignore them. I have two skunk loaches to help control my population of snails, but assassin snails will also work if you were looking to remove them.