The Baggies managed 10th place last term whilst goalkeeper Foster was on a season-long loan and now he has made the permanent move from Birmingham City is looking for further improvement.
"You've always got to be looking to improve," he said on the club's official website.
"Tenth was a great achievement for us and the fact we finished as the top Midlands team was a massive thing for the fans. That's something we've got to try and do again
"From a playing perspective, we're going to be looking to do as well as, if not better than, what we did last year."