Google Scholar Citations provide a simple way for authors to keep track of citations to their articles. You can check who is citing your publications, graph citations over time, and compute several citation metrics. You can also make your profile public, so that it may appear in Google Scholar results when people search for your name, e.g., richard feynman.
Best of all, it's quick to set up and simple to maintain - even if you have written hundreds of articles, and even if your name is shared by several different scholars. You can add groups of related articles, not just one article at a time; and your citation metrics are computed and updated automatically as Google Scholar finds new citations to your work on the web. You can choose to have your list of articles updated automatically or review the updates yourself, or to manually update your articles at any time.
Google Scholar consists primarily of scholarly articles including journal papers, conference papers, technical reports, theses, pre-prints, post-prints, abstracts and court opinions. Google Scholar automatically includes scholarly works from Google Book Search.
Google Scholar's strength is the broad scope of content for both types of publications and disciplines. There is also a better international and multi-lingual coverage.