We know they are doing it but most of us are not sure how.  “"Ephemeral experiences": You might never have heard this phrase, but it's a very important concept. These are brief experiences you have online in which content appears briefly and then disappears, leaving no trace.”

This is a long read but highly recommended.  You may notice some double copy. We don't think that is poor proofreading but maybe interference.  This probably should not be posted on Facebook.