The latest Add Yours story trend, ‘Everyone Tap In, See You At 21‘ is popular on Instagram for taking its users back in time. The challenge is mostly met with throwback pictures from older users, while youngsters are using it to mark the beginning of their exciting twenties. Jump to…Meaning of ‘Everyone Tap In, Let’s See You at 21’ on Instagram‘Everyone Tap In, Let’s See You at 21’ is the new Add Yours story trend to take over the platform. As the name suggests, the templates let you post a picture of yourself at 21. Social media trends that bring back the sweet memories of the past are always…