Ion acceleration by superintense laser-plasma interaction is a rapidly developing field with potential applications in various areas, including medical, nuclear, and astrophysical research. This paper reviews the current state of ion acceleration by laser pulses and discusses future directions. It describes the main experimental observations, scaling relationships with laser and plasma parameters, and the models used to interpret data and suggest new research directions. The paper begins with an introduction to the concept of "coherent acceleration" and its relevance to ion acceleration from plasmas produced by intense laser pulses. It then provides an overview of laser ion acceleration in a nutshell, discussing laser interaction with overdense matter, hot electrons, and ion acceleration mechanisms. The paper then delves into the Target Normal Sheath Acceleration (TNSA) mechanism, which is the primary mechanism for ion acceleration in solid targets. It describes the TNSA scenario, beam properties, modeling, and experimental optimization. The paper also discusses other acceleration mechanisms, including Radiation Pressure Acceleration (RPA), Collisionless Shock Acceleration (CSA), and the Break-Out Afterburner (BOA) regime. It reviews the potential applications of ion acceleration, such as proton radiography, production of warm dense matter, fast ignition of fusion targets, biomedical applications, and nuclear and particle physics. The paper concludes with a discussion of current and future applications, as well as the challenges and opportunities in this field. The paper highlights the importance of understanding the physics behind ion acceleration, including the generation and transport of hot electrons, the role of plasma expansion, and the effects of laser intensity and wavelength on ion energy. It also discusses the need for improved beam characteristics, such as emittance and brilliance, for specific applications. The paper emphasizes the importance of numerical simulations and experimental validation in advancing the field of ion acceleration by superintense laser-plasma interaction.Ion acceleration by superintense laser-plasma interaction is a rapidly developing field with potential applications in various areas, including medical, nuclear, and astrophysical research. This paper reviews the current state of ion acceleration by laser pulses and discusses future directions. It describes the main experimental observations, scaling relationships with laser and plasma parameters, and the models used to interpret data and suggest new research directions. The paper begins with an introduction to the concept of "coherent acceleration" and its relevance to ion acceleration from plasmas produced by intense laser pulses. It then provides an overview of laser ion acceleration in a nutshell, discussing laser interaction with overdense matter, hot electrons, and ion acceleration mechanisms. The paper then delves into the Target Normal Sheath Acceleration (TNSA) mechanism, which is the primary mechanism for ion acceleration in solid targets. It describes the TNSA scenario, beam properties, modeling, and experimental optimization. The paper also discusses other acceleration mechanisms, including Radiation Pressure Acceleration (RPA), Collisionless Shock Acceleration (CSA), and the Break-Out Afterburner (BOA) regime. It reviews the potential applications of ion acceleration, such as proton radiography, production of warm dense matter, fast ignition of fusion targets, biomedical applications, and nuclear and particle physics. The paper concludes with a discussion of current and future applications, as well as the challenges and opportunities in this field. The paper highlights the importance of understanding the physics behind ion acceleration, including the generation and transport of hot electrons, the role of plasma expansion, and the effects of laser intensity and wavelength on ion energy. It also discusses the need for improved beam characteristics, such as emittance and brilliance, for specific applications. The paper emphasizes the importance of numerical simulations and experimental validation in advancing the field of ion acceleration by superintense laser-plasma interaction.