Air Suspension question

My current car 04LX Sport has this I haven't driven a car with this since my 92LX in the 90s lol really love it though smoooooth ride 😁

So lately been house/dog sitting alot and misc landscaping stuff for people in my community so I'm parked outside and been noticing the air pump coming on from time to time when I out doing whatever haven't been in the car in a while... Is this normal..?