To act with wise understanding and consequent success. The Servant of the LORD 'will act wisely' (sakal, Isa 52:13); David 'acted wisely' wherever Saul sent him (1 Sam 18:5). Wisdom leads to success.
Joshua is commanded to meditate on the Torah so that he will act wisely and succeed (Josh 1:8). The connection between wisdom and success in sakal is not material prosperity but aligned living.
Isaiah 52:13 opens the fourth Servant Song with sakal — the Servant will act wisely. The rest of the song shows the Servant's 'wisdom' was the path through suffering to glory — a redefinition of success.