You can sign up for a Google Scholar Citations profile through your Google account (if you do not have one, you will need to create an account to use My Citations).
Now that you have your account set up, you can add finishing touches to your profile by uploading a professional photo, verifying your institutional email, and ensuring that your citations are all listed.
You can make your profile public (i.e. visible to others, and so that it may appear in Google Scholar results when people search for your name) by clicking the "Edit" link next to "My profile is private" and select the "My profile is public" option.
Some of the features of Google Scholar include: