What is the meaning of the underlined powerful?

Scientists have known about ‘classical’ language regions in the brain like Broca’s area and Wernicke’s, and that these are stimulated when the brain interprets new words. But it is now clear that stories activate other areas of the brain in addition. Words like ‘lavender’, ‘cinnamon’, and ‘soap’ activate not only language-processing areas of the brain, but also those that respond to smells as though we physically smelled them. Significant work has been done on how the brain responds to metaphor, for example. Participants in these studies read familiar or clichéd metaphors like ‘a rough day’ and these stimulated only the language-sensitive parts of the brain. The metaphor ‘a liquid chocolate voice’, on the other hand, stimulated areas of the brain concerned both with language?and with taste. ‘A leathery face’ stimulated the sensory cortex. And reading an exciting, vivid action plot in a novel stimulates parts of the brain that coordinate movement. Reading powerful language, it seems, stimulates us in ways that are similar to real life.

What is the meaning of the underlined powerful? I found a meaning of the word on https://www.merriam-webster.com/dictionary/powerful: leading to many or important deductions. Is the word used with that meaning?