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Feedback to the interstellar medium (ISM) from ionising radiation, stellarwinds and supernovae is central to regulating star formation in galaxies. Dueto their low mass ($M_{*} < 10^{9}$\,M$_\odot$), dwarf galaxies areparticularly susceptible to such processes, making them ideal sites to studythe detailed physics of feedback. In this perspective, we summarise the latestobservational evidences for feedback from star forming regions and how thisdrives the formation of 'superbubbles' and galaxy-wide winds. We discuss theimportant role of external ionising radiation -- 'reionisation' -- for thesmallest galaxies. And, we discuss the observational evidences that thisfeedback directly impacts galaxy properties such as their star formationhistories, metal content, colours, sizes, morphologies and even their innerdark matter densities. We conclude with a look to the future, summarising thekey questions that remain unanswered and listing some of the outstandingchallenges for galaxy formation theories.

Observational constraints on stellar feedback in dwarf galaxies