NCBI is the National Center for Biotechnology Information. Setting up a free NCBI account allows you to personalize PubMed:
Save collections of results from searches (the clipboard only holds results for 8 hours).
Save your searches and set up email alerts that can be set to automatically run against database updates.
Customize personal preferences like filters and display settings.
You can use your GSU CampusID and password to sign into your NCBI account.