This paper starts off with the introduction of the concept of 5G technology. Prior to learning about how 5G networks influence the world, we will begin with the development of 5G technology Researchers are fighting with security issues because 5G technology is in the testing phase in most countries. Then, we dive into how 5G networks influence modern technologies such as artificial intelligence (AI) and the Internet of Things (IoT). Finally, if all the current issues with 5G networks are resolved, it can be that foundation for the concept of a "smart city," which is expected to resolve several longstanding issues with infrastructure, public transport, the environment, etc. IT infrastructure is being transformed by 5G technology, which likewise poses business and technical configurations both amazing opportunities as well as challenges.