The Moroccan, signed by Palace in the summer, has scored three goals in his last three games, including netting the winner against West Ham at the start of the month.
Chamakh only scored eight league goals in his three-year spell at Arsenal, but his recent form has revitalised Palace in their first season back in the top flight since 2005.
Pulis told The Sun: "We have played Marouane in a different role and he has blossomed.
"We have got a player that we can play through. If you give him the ball, he can make things happen and he can certainly take you up the pitch.
"They are getting used to the fact that we have to try and play through him as much as we can to make us a team that can create chances.
"There is more space and more opportunity to get him on the ball and not with his back to goal.
"He has enjoyed it and his performances over the last few games have been quite outstanding.
"He is important to us and the rest of the lads understand that."