Attaches to nouns to express the quality of the response or feeling one gets from something. Often used in words like 手応え (tangible response) or 歯応え (chewy texture).
Attaches to the continuative form of verbs to mean 'worth doing' or 'rewarding to do'. Common examples include 見応え (worth watching), 読み応え (worth reading), and やり応え (worth doing).