Current awareness services are tools you can use to keep up to date with the latest professional literature in your field of interest. There are a few different types of current awareness services available and different information providers may refer to their current awareness tools using different names.
Search alert services allow you to automatically run saved database searches with the results delivered directly to your email or to an RSS reader.
Citation alert services enable you to track new articles that cite an article you have chosen by sending you an email every time the article has been cited.
Journal Issue or Table of Contents (TOC) services are offered by many professional journals. With TOC alerts the latest table of contents is sent to you via email or RSS feed.
PubMed/My NCBI Services
Web of Science