informative
in-for-ma-tive
adjective
Providing useful or interesting facts and knowledge.
"The lecture was highly informative about local wildlife."
Thesaurus
Synonyms: consultatory, telling, newsy, illustrative, informatory, telltale, exemplifying, revealing, consultative, consultive, advisory, ostensive
Antonyms: unenlightening, unilluminating, uninformative, uninstructive