Google Scholar Citations provide a way for authors to keep track of citations to their articles.
You can create your Google Scholar Citations profile here.
The Google Scholar Citations web site includes information on:
Check who is citing your publications,
Graph citations over time,
Compute several citation metrics,
Make your profile public, so that it appears in Google Scholar results when people search for your name,
Choose to have your list of articles updated automatically or review the updates yourself, or to manually update your articles.
It is a profiling system, not a registry and, as such, it attributes to authors no unique alphanumeric identifiers
A statistical model is used to try to tell different authors apart - you need to double check whether the articles attached to your profile are really yours
While there isn't true integration between ORCID and Google Scholar Citations, you can import citations you find in Google Scholar into ORCID using BibTeX.