The Metric Tide (July 2015), commissioned by HEFCE, concluded that metrics cannot and should not replace peer review in research assessment exercises. It urges the use of Responsible Metrics (see: The Leiden Manifesto published in Nature).
REF2021 "We do not accept that journal impact factors (or the use of specific lists of acceptable journals) are an appropriate factor in the selection of publication venue" (HEFCE http://www.hefce.ac.uk/rsrch/oa/FAQ/#exeptions10)
Dr Charles Martinez of Elsevier presented 2 workshops on using SciVal. UoP staff can access the recording of the workshops:
The H-index is the main author metric. Created by Jorge Hirsch.
"Obviously a single number can never give more than a rough approximation to an individual's multifaceted profile, and many other factors should be considered in combination in evaluating an individual..........especially in life-changing decision such as the granting or denying of tenure" Hirsch http://arxiv.org/PS_cache/physics/pdf/0508/0508025v5.pdf
More information on the H-index
But if you do want to know your H-index
Determining a journal's 'ranking' position may help you identify where to publish.
Follow the golden rule of metrics - Never rely on one set of metrics.
The alternative measurement of impact. Altmetrics captures mentions from social media sites, newspaper articles, policy documents, television and radio.