Haaland scored in victory at Nottingham Forest on Sunday.
"Haaland is a goalscorer, simple as that," said Waddle on BBC Radio 5 Live.
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"He isn't known for his link-up play, dribbling or skills - he is a goalscorer and that is what he is good at.
"It was a good finish and he passed it into the bottom corner - with him coming back he will probably be the difference."