Want to means to have a desire or wish to do something. When you want to play outside after finishing your homework, you feel pulled toward that activity. When your friend says she wants to learn guitar, she's expressing her interest in making that happen.

The phrase captures that feeling of being drawn toward something, whether it's something small like wanting to get a snack or something big like wanting to become a scientist. It's about what appeals to you, what sounds good, or what you'd choose if you had the choice.

Notice the difference between wanting to do something and actually doing it. You might want to stay up late reading, but you still have to go to bed. You might not want to practice piano today, but you do it anyway because someone expects it or because you have a goal.

People sometimes confuse want to with wanna, which is how the phrase can sound in casual speech. In writing, stick with want to unless you're capturing how someone actually talks. When you write “I want to help,” you're being clear and correct. When you write “I wanna help,” you're showing informal, spoken language.