It's probably something coming from an app. Maybe you clicked an ad?? If you go to
http://www.jampp.com/, you can see that they are an app promotion service. The tracker/redirection is likely used to show how you arrived at the app in the app store. Basically a way to track and/or prove that you ended up there because of their services or app promotion.
Let me try to use a clearer example.
You're playing a game. You click an ad that is a promotion for another game. The ad links to jampp.com and then redirects to the link on the play store. Thus showing that Jampp guided you to the play store link.
Many websites do this as well as a way to track referrals. When you are on a webpage and visit one of their suggested sites, usually you can watch a redirect happen in your web browser to track that you made it to the other webpage through their webpage.