If you're visiting this site, you're providing information to Google, with all the privacy problems, data abuses, packaging of information and tracking that entails. Think twice before providing any information of any kind to this company: they won't hesitate to package it up with everything else you've ever given them and sell it as a neat bundle to advertisers; after all, they're an advertising company, that's what they do.
This Google sub-domain is used for checking user account activity and changing account settings. Completely safe and connection is encrypted.
Your contract to the real devil.
Google is the worldwide search engine !
GMAIL for Google. Privacy issues otherwise safe site.
The privacy issues are a concern, and it's not easy to opt out; example Google+. In addition, Google links are embedded a variety of websites. I agree with the other posted comments regarding having too much control.
Use caution and check all privacy settings so you don't leave a huge electronic paper trail. This is the Faustian Bargain you do all the time with Google as it monopolizes a good chunk of the internet with very useful stuff.
So easy to use, great features and overall good stuff. But then there's NSA and ads… But it's so hard to resist.
I use it almost everyday, it helps me a lot!