?wtx=Y showing up on Google Analytics
This isn't a typical question but it is web related and pertaining to a clients website. I've done some research on it and wanted to check and see if anyone on here is had issues like this. 

    #1: /Fanuc-servo-motor-repair/?wtx=Y
    #3: /?wtx=Y
    #26: /yaskawa/?wtx=Y

As you can see, these urls all end with ?wtx=Y. Does anyone know what could be causing this? It's kind of hard to explain to a client when I can't figure out where it's coming from myself. Would it be pertaining to an account like Google AdWords or AdCenter(Bing/Yahoo)?
?wtx=Y showing up on Google Analytics
===

This isn't a typical question but it is web related and pertaining to a clients website. I've done some research on it and wanted to check and see if anyone on here is had issues like this. 

    #1: /Fanuc-servo-motor-repair/?wtx=Y
    #3: /?wtx=Y
    #26: /yaskawa/?wtx=Y

As you can see, these urls all end with ?wtx=Y. Does anyone know what could be causing this? It's kind of hard to explain to a client when I can't figure out where it's coming from myself. Would it be pertaining to an account like Google AdWords or AdCenter(Bing/Yahoo)?