1. Open the Reddit app and go to a subreddit you want to engage with. In order to share a GIF on Reddit, you will need to download a GIF from GIPHY or Tenor to your device.
2. Once you've downloaded the GIF you want to share. Start a new post or comment on an existing post. Tap the Video button and upload the GIF of your choice from your video library.
3. You can edit the GIF to your liking. Editing is not necessary. Once you are satisfied with the GIF you can post it inside of your post or comment like you would any other text-based Reddit comment.