Usually a term known as subscribing to someone on
youtube, where you click that little yellow button in order to keep
track of their newest videos and favorites. However
people use it for other reasons such as:
- Trying to be at top of the subscribers list (On a
popular channel most likely) to get a lot of views and pretty much a hundred subscribers overnight.
- To try your way at "The person with the most subscriptions" and get easy subs out of that. Many have thousands for example I have 4895 right now. Only a few (Such as classicusernames) have over 50000.
- To put someone at the top on your subscription list, just for a little gift of views and/or subscribers.