You can save articles to your Google Scholar Library using the "Save" link (star icon) below the article record.
If you are not logged into Google Scholar (or another Google service) you will be prompted to log in. After logging in you will be returned to you search results and you can now save articles.
Saved articles can be viewed clicking on the options (hamburger) menu and using the "My Library" link, or from the link at the top of the page.
You can label your saved citations for easy sorting - useful if you are saving citations for several projects.