The paper discusses the integration of sensing and communication (ISAC) in 6G networks, emphasizing the potential for new services and improved resilience. ISAC combines sensing capabilities with communication to provide enhanced services beyond traditional communication. The paper outlines the vision for ISAC networks, the techniques for integrating sensing and communication, and the applications in 6G. It highlights the importance of signal processing, optimization, and machine learning in enabling ISAC. The paper also discusses the different frequency bands and MIMO technologies that can be used in ISAC, as well as the various sensing modes and their applications. The paper emphasizes the need for accurate channel estimation and the challenges associated with it in ISAC systems. It also discusses the potential of ISAC for applications such as positioning, localization, and radio SLAM. The paper concludes that ISAC is a key technology for 6G and that further research is needed to fully realize its potential.The paper discusses the integration of sensing and communication (ISAC) in 6G networks, emphasizing the potential for new services and improved resilience. ISAC combines sensing capabilities with communication to provide enhanced services beyond traditional communication. The paper outlines the vision for ISAC networks, the techniques for integrating sensing and communication, and the applications in 6G. It highlights the importance of signal processing, optimization, and machine learning in enabling ISAC. The paper also discusses the different frequency bands and MIMO technologies that can be used in ISAC, as well as the various sensing modes and their applications. The paper emphasizes the need for accurate channel estimation and the challenges associated with it in ISAC systems. It also discusses the potential of ISAC for applications such as positioning, localization, and radio SLAM. The paper concludes that ISAC is a key technology for 6G and that further research is needed to fully realize its potential.