When you share a Glympse with someone, in addition to seeing your location in real-time we also display a trail of the last 10 minutes of where you've been. To keep the map nice and tidy for viewers and to reinforce that sharing with Glympse is temporary, we expire the portion of the trail older than 10 minutes.
In response to users' request for the capability to save or archive their trails, we introduced Evernote integration with Glympse. This feature allows you to save a complete view of your Glympse trail to your Evernote account. You can read more about that feature here: