When the DBpedia autocomplete option is configured, you will get suggestions from DBpedia, whenever you create new concepts.
DBpedia suggestions are depicted with this iconin the autocomplete drop down.
Seelct a suggestion from DBpedia and the concept will be created. Additionally the respective DBpedia resource is added to the concept as a skos:exactMatch.
Based on your DBpedia autocomplete settings, alternative labels and definitions are retrieved from DBpedia as well.