It can be used in various contexts:
* טאָן האָבן (ton hobn) - to have pleasure
* טאָן געבן (ton gebn) - to give pleasure
* טאָן נעמען (ton nemen) - to take pleasure
Keep in mind that Yiddish has many nuanced words, and "ton" is just one way to express pleasure. The specific word you use will depend on the context and the intended meaning.