Journal Impact Factors (JIF) are released annually by Clarivate Analytics. All journals in the JCR appear in the Web of Science journal citation databases. The Journal Impact Factor gives a measure of the frequency that the average article in a journal has been cited in a particular year or number of years.
Scopus is the largest abstract and citation database of peer-reviewed literature: scientific journals, books and conference proceedings and features tools to track, analyze, and visualize research.
SCIMago Journal Rank (SJR)
Using Scopus data, SCImago Journal Rank (SJR) offers metrics that are the average number of weighted citations received in year over the number of documents published in the previous three years. Citations are weighted--worth more or less--depending on the source that they come from (subject field, quality and reputation of the journal, etc.) These metrics can be applied to journals, book series and conference proceedings. The SCImago site allows you to view journal rankings by subject area. Below is a brief tutorial about locating journals in Arts and Humanities by SJR quartile and H index ranking.
The SCImago Journal & Country Rank includes the journals and country scientific indicators developed from the information contained in the Scopus database. It includes two metrics: SCImago Journal Rank (SJR) and Source Normalized Impact per Paper (SNIP). SJR is based on times cited, but also uses an algorithm to calculate article influence, which it uses to create rankings.