If you use PubMed, creating an account with My NCBI is very helpful. It allows you to save searches, and gives you the option to receive emailed alerts when citations are added that meet your search criteria.
NCBI stands for The National Center for Biotechnology Information. It is a division of the NLM, the National Library of Medicine, which is the department that creates and maintains MEDLINE, the database that PubMed uses.
To create an account, follow these steps: