Besides traditional citation counts, there are many ways of tracking research impacts. They try to capture the presence in new scholarly venues, presence and impact in social media and other forms of online engagement, such as views, downloads, bookmarks etc. Collectively, we refer to these as alternative metrics or "altmetrics", as opposed to traditional citation measurement using Web of Science, Scopus and other citation enhanced databases.
Views from Academia:
Professor Pádraig Cunningham of UCD School of Computer Science and Informatics outlines h-index calculation and why it is not a usable metric for early career researchers