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. You can build a corpus from your own texts, or if you do not have any, you can have Sketch Engine find relevant texts for you.
Log in, build a corpus or select a corpus built previously. 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.