Heavy quark jets at the LHC

We summarize measurements of [Formula: see text] and [Formula: see text] jet production at the LHC, which are an important signature and background for decays of massive particles such as [Formula: see text]. These include measurements of the inclusive and dijet production of heavy quark jets, [Formula: see text] and [Formula: see text] jets produced in association with vector bosons [Formula: see text] and [Formula: see text], and decays of boosted [Formula: see text] bosons into pairs of [Formula: see text]. The current status of [Formula: see text] tagging and [Formula: see text] jet energy scale is also reviewed. These measurements test perturbative QCD in the four and five-flavor number schemes, and provide insight into the relative importance of heavy flavor production through flavor creation, flavor excitation and gluon splitting channels. The [Formula: see text] measurement provides additionally a powerful way to probe the strange quark and antiquark sea in the proton. The recent studies looking separately at production of one and two [Formula: see text] jets find generally good agreement with theory predictions for two [Formula: see text]-jet production, while some discrepancies are observed for singly produced [Formula: see text] jets, particularly at large [Formula: see text]-jet [Formula: see text], where gluon splitting becomes dominant.