Keywords are single words (tokens) which appear in the focus corpus more frequently than they would in general language. The general language is represented by the reference corpus.
Terms are multi-word units (phrases) that fulfil two conditions:
(1) they appear in the focus corpus more frequently than they would in the general language (or in a reference corpus)
(2) they have a structure allowed for terms in the language (set in a term grammar)
How to use keywords and terms
Term extraction, generally, only makes sense with user corpora. If you do not have one, you can have Sketch Engine quickly create one for you.
Log in and select a corpus. On the dashboard, click KEYWORDS & TERMS or use the same button on the main menu. The procedure will start automatically. The extraction can take several minutes for very large corpora.