I am looking to implement Google Analytics into a Sharepoint 2013 site. I have my GA tracking code ready to go, and have full access to all master pages in the site. However, after reviewing the answers already posted, I am still unsure of exactly which master page to paste it into (I am fully ok with where in the tags it goes. I have a number of pages identified as master pages in the following configuration:
html master page: 4 pages
Master Page: 3 pages
ASP NET Master Page: 3 pages
All of these seem that they could be an option, and no one master page is greyed out indicating it is in use. HOWEVER! I am working in Sharepoint Designer 2013, and when I sort these pages by date modified, I can narrow it down to 2 x html master pages and 2 x asp net master pages, with the 2 html master pages having the blue icon indicating that they have been modified from the site definition. So, pardon my long message, but should I be inserting the GA code to all of these asp and html master pages or just certain pages?