Long ago, before Gutenberg, if you wanted to know something, you had to memorize it.
It is important to memorize all the chemical formulae for the reaction we are looking at in today's lab.
Use words that are easy to understand, pronounce and memorize.
A good idea is to either take a guide into the field when trying to identify snakes, or to memorize the details of a few species that are of interest before setting out.
If people only memorize or just read texts, they receive no benefit from them.