Ground-level ozone (O₃) pollution can adversely affect human health and vegetation, thus being an important environmental issue nowadays. Ozone biological monitoring (biomonitoring) is a method of O₃ monitoring by observing quantitative changes in living organisms physically present in a specific environment. Here, we provide a concise view of the field of O₃ biomonitoring, along with recent advances that are expected to advance this field in the future. We also recommend that O₃ biomonitoring is included in citizen science initiatives as well as in worldwide curricula of educational institutions. Policy-makers and general public may not understand biomonitoring data; hence, a major challenge is how to communicate the information to the audience in a way that permits the best comprehension.