  The measurement of exclusive $e^+e^-$ to hadrons processes is a significant
part of the physics program of $BABAR$ experiment, aimed to improve the
calculation of the hadronic contribution to the muon $g-2$ and to study the
intermediate dynamics of the processes. We present the most recent results
obtained by using the full data set of about 470\,fb$^{-1}$ collected by the
BABAR detector at the PEP-II $e^+e^-$ collider at a center-of-mass energy of
about 10.6 GeV. In particular, we report the results on $e^+e^-$ annihilation
into six- and seven-pion final states. The study of the very rich dynamics of
these processes can help to understand the difference seen between the QCD
prediction and the sum of exclusive cross sections in the energy region around
2 GeV, thus improving the precision on the total hadronic cross section and of
the $g-2$ calculation.
  Additionally, we report the results on a dedicated study to shed light on the
resonant states production in the energy region around 2.2 GeV, which is
presently rather unclear. We measure the reaction $e^+e^-\to K_SK_L$ with data
collected with the $BABAR$ detector and analyse these data in conjunction with
published BESIII data on $e^+e^-\to K^+K^-$ and $BABAR$ data on $e^+e^-\to
K^+K^-$, $\pi^+\pi^-$, $\pi^+\pi^-\eta$, $\pi^+\pi^-\omega$. This study
supports the existence of an isovector resonance $\rho(2230)$ consistent with
the resonance observed by BESIII.
