By influencer is meant that any famous personality or celebrity advises people to use your product. This trend has been made even more popular by Instagram, Snapchat, TikTok, and YouTube. It is also effective because on these social networks, millions of followers of any celebrity get influenced and definitely try to test or buy the recommended product, but there are still many companies that do not try to adopt this kind of marketing and have adopted traditional methods. If you think that what celebrities say does not affect people, then look at the effect of one tweet by Kylie Jenner, which she made about Snapchat's struggle.