The striker enjoyed one of his best displays in recent years, with a hat-trick against Arsenal on Saturday.
The striker has endured another frustrating campaign as injuries have once again limited his game time.
However, he showed his qualities last weekend with a hat-trick in the London derby against Arsenal showing his qualities.
It was an impressive display from the giant forward, with it sparking talk of whether he should be considered by England manager Roy Hodgson this summer.
One criticism labeled at Carroll is that he does not score regularly, but Bilic insists he does not have to score goals as his presence is good enough.
"Andy Carroll did brilliant for us on Saturday against Arsenal,” he told whufc.com.
“My opinion on him is that when he is fit and on form, he is a very special kind of player. He brings you something that very few players can.
"He is different, he is hard to cope with and hard to deal with, and he has done really well for us every time he has been fit. He doesn’t have to score, because his presence on the pitch gives us another dimension."
If Carroll is able to remain fit and on form between now and the end of the season, there is no denying he is a useful asset to have.
There is a lack of big, traditional centre forwards in the modern game, and that has caused defenders to forget how to deal with them, as was perfectly demonstrated in the draw with Arsenal.
That fact could be what ultimately tempts Hodgson in his selection this summer, with defenders around Europe unlikely to fancy coming up against the West Ham star at any point.