There are multiple levels, with tools at each level, at which you and your work can be assessed.
Journal Impact measures the influence of a journal, and the most well-known measurement of this is the Impact Factor.
Author Impact measures the influence of a particular researcher in their field based on their publications. The most well-known measure of this is the H-Index.
Article Impact/Altmetrics attempt to measure the impact of particular articles through tracking various data. Plum Analytics and Altmetric are the two most well-known products to allow this type of tracking.
The content of this guide is based largely on work previously done by Kathryn Houk at Tufts Hirsh Health Sciences Libraries, and on the updated version of this work in their current research guides.