Who needs wisdom? Everyone. According to Ecclesiastes 12:1, "Remember now your creator in the days of your youth".
What is wisdom? Good judgement, sound decisions, applied knowledge.
Where can I find wisdom? The wisdom books of the Bible are Job, Psalms, Proverbs, Ecclesiastics, and Song of Solomon. However, there is wisdom found throughout the Bible from Genesis through Revelation. Ultimately, we find wisdom in God's Son, Christ Jesus.
When do we need to wisdom? In relationships, with finances, at work, during free-time, and with the myriad of choices we have to make.
Why do we need wisdom? To make good decisions. To live a life that matters. To avoid harm.
How do we get wisdom? By obeying and fearing the Lord. According to Psalm 111:10, "The fear of the Lord is the beginning of wisdom; a good understanding have all those who do His commandments". By asking God for it. According to James 1:5, "If any of you lacks wisdom, let him ask of God, who gives to all liberally and without reproach, and it will be given to him".