Socrates completes his argument moving virtue away from the "what" to the "how", from particular activities appropriate to types of people and towards virtue as the appropriate way in which any activity is done. This allows all types of people to be good in just one way, common to all - they do what they do "well" - which is in stark contrast to Meno's first answer, the list of many different virtues (= good roles) appropriate to different types of people. This is in line with Socrates' desire to receive an answer pertaining to the one aspect of virtue in all good things. His division of "well" into "justly" and "self-controlledly" is therefore all the more suspicious. Socrates incidentally shows that adverbs, nouns in the dative, and adjectives all say the same thing in different ways ("justly", "with justice", "just"); and we see that Meno is already aware of this common usage of the Greek language.

Here I read through Platonic dialogues, translating and commenting on the Greek text as I go.

The resulting analyses may be found at:
https://theplatoparadigm.com

The full analyses include Euthyphro, Io, Hippias Minor, and Lysis, with extract/summaries from my books on Hippias Major, Meno, and Politeia (Republic)