Sitiawan is a small town and basically nothing much to see. You may enjoy the fresh seafood and also visit the newly build up temple.
Most of the people in Sitiawan know how to speak fuzhou dialect and they are selling alot of fuzhou food and biscuit.
Apart from that, seafood is a must try.
Less than 30 minutes to Lumut (the jetty to Pangkor Island). Sitiawan has been fast growing in this recent years.
Close to few beaches and plenty of fresh and local seafood too.