Another way to say it is that you write in such a way that readers feel they're involved in the story or the illustration.
I caught this April 30, 2001, from a lead article in USA Today. This is nonfiction called, "A puff of smoke, and then chaos at 4,000 feet" by Jack Kelley.
Missionary worker Jim Bowers peered uneasily out the front passenger window of a Cessna 185 floatplane. To his right: a Peruvian air force fighter jet.Notice "peered uneasily," "puff of smoke," "bullets pierced." That's descriptive writing and puts us inside that Cessna.
It had been tailing the Cessna for about 15 minutes.
Suddenly, there was a puff of smoke from the fighter. Bullets pierced the missionary plane in machine-gun fashion. The jet flew under the Cessna, reappeared on its left and fired again.
Because I want readers to feel they are part of the story
I write descriptively.