Metal halide perovskites (MHPs) have shown remarkable improvements in power conversion efficiencies in photovoltaic cells. This review discusses the mechanisms limiting charge-carrier mobility in MHPs and how they can be tuned through changes in stoichiometry. It also explores extrinsic factors such as grain size, energetic disorder, and self-doping that affect mobility. MHPs have favorable charge-carrier mobilities, which contribute to their high performance. However, their mobility is limited by intrinsic factors like electron-phonon coupling, particularly Fröhlich interactions, and extrinsic factors such as grain boundaries and impurities. The mobility of MHPs is often compared to that of inorganic semiconductors like GaAs, which have higher mobilities. The charge-carrier mobility in MHPs is influenced by the composition and structure of the material, with factors such as ionicity and phonon frequencies playing a key role. Extrinsic factors, including grain size and doping, also significantly impact mobility. The review highlights that while MHPs have high intrinsic mobility, extrinsic factors can reduce it. The study also discusses the importance of controlling crystal structure and composition to optimize mobility. Overall, the review emphasizes the need to understand and mitigate both intrinsic and extrinsic factors to achieve higher charge-carrier mobilities in MHPs.Metal halide perovskites (MHPs) have shown remarkable improvements in power conversion efficiencies in photovoltaic cells. This review discusses the mechanisms limiting charge-carrier mobility in MHPs and how they can be tuned through changes in stoichiometry. It also explores extrinsic factors such as grain size, energetic disorder, and self-doping that affect mobility. MHPs have favorable charge-carrier mobilities, which contribute to their high performance. However, their mobility is limited by intrinsic factors like electron-phonon coupling, particularly Fröhlich interactions, and extrinsic factors such as grain boundaries and impurities. The mobility of MHPs is often compared to that of inorganic semiconductors like GaAs, which have higher mobilities. The charge-carrier mobility in MHPs is influenced by the composition and structure of the material, with factors such as ionicity and phonon frequencies playing a key role. Extrinsic factors, including grain size and doping, also significantly impact mobility. The review highlights that while MHPs have high intrinsic mobility, extrinsic factors can reduce it. The study also discusses the importance of controlling crystal structure and composition to optimize mobility. Overall, the review emphasizes the need to understand and mitigate both intrinsic and extrinsic factors to achieve higher charge-carrier mobilities in MHPs.