{F} $-saturated if $ G $ is $ F $-free for any $ F\in\mathcal {F} $ but for any edge e in the
complement of $ G $ the (hyper) graph $ G+ e $ contains some $ F\in\mathcal {F} $. We
survey the problem of determining the minimum size of an $\mathcal {F} $-saturated (hyper)
graph and collect many open problems and conjectures.