The £60m arrival from Real Sociedad has a lot to develop, says Shearer.
He said, “The club record of £60m is something Isak will have to live with. That's a lot of money, but what doesn't cost these days?
“I was a British record signing when I went to Blackburn Rovers in 1992, then a world record signing at Newcastle four years later and it didn't bother me. I enjoyed it.
"Isak is not a complete striker. There are things he can develop, and I'm sure he will. And there comes (Eddie) Howe into the equation."