In this talk I will review some topics of composite Higgs models. These can successfully address the origin of the Higgs boson, as a pseudo-Goldstone of a spontaneously broken global symmetry, and flavour physics via the partial compositeness mechanism. If the dynamics leading to such a low energy models is generated by a simple underlying theory defined in terms of a confining gauge group with fermionic matter content, models which contain a Higgs and top partners at the same time also contain additional light scalars in the composite spectrum. Such new states can have an important role in constraining theses models of partial compositeness.