When you receive likes & comments from accounts having more than 50K followers those likes and comments are referred to as Power Likes & Comments. Let's simplify this further using an example. Let's say that there are 20 accounts with 200,000 followers each and they all like your post. What this does is that it exposes you to a network of those 20 accounts (20*200,000), summing up to 4 million! Your posts instantly land up on the explore feed of people who follow these accounts and you start receiving thousands of likes and millions of impressions within minutes. That's a big reason why people related to celebrities get instantly famous on Instagram. This method works for almost all social media networks, be it facebook, twitter, snapchat or musically.