The document discusses three slide sharing apps: Instagram, Flipgram, and Facebook. Instagram allows users to post and edit photos and videos on mobile phones and computers. Flipgram is similar to Instagram but focuses on quick mini presentations with added background music. Facebook allows sharing of photos, videos, and music between friends on mobile or computer, though content is only visible to connected friends. The document concludes by reflecting that the author learned about additional editing capabilities across these platforms and may try using Flipgram.