So i use them for statistical purpose, it let me know (roughly because i am only using their free version which have limitation), so these websites let me know from which country the visitors come from, how many per day i get visitors, what browser they use, if my visitor are Mac or PC, and few other things that i don't care.
I use Sumome-appsumo for the email subscription to my newsletter, here are their policy >> http://www.appsumo.com/privacy/ and terms of service >> https://help.sumome.com/customer/en/portal/articles/1991685-terms-of-service
So i do not have control on those tools, nor on the Jimdo.com code base (Jimdo is what my website is made with and hosted, and they use "tag-manager" from google too...) for example Google Custom Search might put some "featured links" in the top of the search where i have no control, because i use the free version.
In case of advertising by Google of its famous "featured" links, and if you are like me (i hate advertising, specially the misleading ones), i recommend you to add to your browser AdBlock Plus (ABP, and yes it is free)!
ABP is for Chrome, Firefox, Safari, Opera, IE, Edge, Android and many more web browsers >> https://adblockplus.org/
No more advertising with ABP (AdBlock Plus) and not only with google but everywhere on internet.
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