You become ‘Mr Meme’. You are the internet’s trend setter.
Whatever you ‘like’ or ‘upvote’ online becomes the most popular thing online for the next 24 hours.
Like a Youtube video? Get ready to see it reposted again and again. Upvote a silly comment? The New York Times is now writing articles about the new internet sensation you’ve started.
After 24 hours, the post, video or meme fades from the zeitgeist and things return to normal. That is unless you upvote it again.
No-one else inherently knows about your effect on internet culture, unless you share the knowledge of your powers.