Last year, my friend checked her Instagram engagement numbers and noticed something unusual. They tanked. “I used to get lots of likes and comments, but now it has totally dropped off,” she told me. I asked her what she was doing differently. Her answer? “Nothing.” And that was the issue. Instagram has changed a lot since it first launched in 2010. They now have 800,000,000 monthly active users. And while that number is incredible, what is more striking is the rate at which the platform is growing. In 2013, it had 100,000,000 users. In 2016, it had 500,000,000 users. By