Ants may be useful when they are outside, but they are much less useful when they are in your house. You don't want to look down in your kitchen or bathroom and see ants walking around your counters. There are things that you can do that will help you get rid of them.
One thing that you can do is wipe everything down with white vinegar. You can dilute the vinegar or use a different form of vinegar if you don't like the smell of white vinegar, but white vinegar is generally the most economically feasible. The reason behind washing everything down with vinegar is that it kills the pheromone trails that ants lay down. They do that so that the other ants in their nest can find the food or shelter source that the scout ant found. If there aren't any trails to follow, the ants won't be able to make it back to that place. Anywhere that you see an ant walking around, you should spray the area down and wipe it off. This is also going to be a non-toxic way to help control and eliminate ants, so it can be good to use around your pets and kids, as well as places you are going to eat.
If you have any drippy or leaky pipes, you want to get those fixed as soon as possible. That's because ants are attracted to water. They want to have a place to drink, just like you do. It doesn't even have to be a very big leak, even just a small one that runs along the pipe is going to be one that attracts ants. So, if you think that you might have ants, you should check to see if there are any leaky pipes in your bathroom or kitchen. Tighten everything up and make sure that you have gotten rid of any leaks so that the ants aren't going to have a place to get the water that they need.
If you have ants, or you want to make sure that you don't get ants, then you need to make sure that you are doing everything you can to prevent them. That can include contacting an exterminator. The exterminator can come in and help you get rid of the ants, as well as evaluate your house to make sure that they can help keep any more ants from getting into your house.
Talk to an ant control professional to learn more.