Facebook Timeline – What Are Trips on the Map Page?

I don't think G+ (or any other) will delete your content.

I think there is a best practice somewhere that says "do not delete anything" (at least this is how I learned database design), it's just like in nature "nothing is lost, everithing is recycled". :)

They rely on content—think of Google search—sometimes it seems that it knows what you want to search, beacause the more users search, their database grows bigger and bigger, the more database searches that can compare with the more precise is the result. This is true for social media to, they build a profile for every user, and they build the so called "social graph" of the world (read this interview). :)

What they do with the results... first they are showing custom ads, I think they even sale the results to big companies—they have data that is extremly valuable in marketing. For example: a phone company launches 2 new models, m1 and m2, after a few weeks they go to G+, Facebook, and ask them, what is the phone that users talk more m1 or m2, and what phone from a competitor is on top of users talks?

So you need to know that every time you register to a service like this, ALL your data will be stored forever by the company, be it G+, Facebook... you name it.

That's my opinion.

1. Go to your Timeline
2. Click on Activity Log
   
3. Click All at the top of the page
   
4. Click on Posts with Location
   
5. Hide from Timeline all that shows in the list

To hide the map from favorites:

1. Go to your Timeline
2. Click on the arrow at the end of the favorites row
   
3. Hover over the Maps box
4. Click on the edit icon that appears in the upper-right corner of the box
   
5. Click on Remove from Favorites
   

Source.