Friendversary is the term used by Facebook to celebrate anniversary of being friends on Facebook. Facebook may create a nice video in your feeds on the anniversary of the day you became friends on Facebook with a friend. You can edit the photos in the video and share it with your friends.
You can create your Friendversary video on Facebook by opening your ONTHISDAY app and see what is available for you today.
You may be notified that Facebook have created the video for you, and you can decide to share it. The video can be found when you access OnThisDay App on Facebook. You can share the video with your Facebook friends.