Answer:
Celebrities are familiar faces for the public and easily become role models towards the community.
Step-by-step explanation:
Seeing famous people endorse products makes people associate their fame with that product or they just want to be like that celeb and try and emulate their actions. It is most common among teenagers where they will copy "trends" of ppl who r popular or famous. Using a celebrity to endorse your products might be expensive but if you have the right celeb for the right audience then it would be worth it for recognition. Thats another thing. If you use a celebrity who is easily recognized by people alongside you product then they are more likely to remember your product.
Hope this helped, sorry it was kinda long. XD