About

"-ing"-ing is a tatic people use to make simple or minute things gain larger attention and turn into fads due to the "ing" making it a thing that others should do and it will often be something odd.

Online History

From Planking, to Cone-ing, to Milking. "-ing" has been used massively to make something into a meme and have others follow the trend no matter how embarrassing or useless. The meme rarely ever dies out and often times gets revived due to the amount of people who have done/are willing to do it, since the trend can get more and more views if the stunts are being done in a competition to see who can do it the best. Whether or not it is a good thing to have. There is no doubt it will only grow stronger as it's an easily useable thing to use to make something normal seem important. Similar to the #.
More "ing" memes spawn randomly and the effects are the same as the others.
Either you're with them, or against them.

Reception

It's been argued through the years if "-ing" memes are really worthy of becoming so popular with relatively meaningless stunts.
But the stunts were so popular that celebrities alike were riding along the hype and decided to give it a swing while it lasted.
Making the memes that spawned with "-ing" synonymous.