  We present a compact review of the status of QCD spectral sum rules until
2022. We emphasize the recent progresses for determining the QCD input
parameters ($\alpha_s$, running quark masses, quark and gluon condensates)
where their correlations have been taken into account. Some selected
phenomenological uses of the sum rules in different channels (light and heavy
quarks, gluonia/glueballs, hybrids and four-quark states) are briefly reviewed
and commented. The estimate of the $1^{-+}$ light hybrid mass is revised which
confirms the hybrid nature of the $\pi_1(1600)$ but not the $\pi_1(2050)$.
