AWS Kinesis is a very popular AWS managed service that is cloud-native, scalable, that allows real-time stream processing, of large data per second. It is used to gain or extract insights, from numerous sources like multimedia, text, etc. at real-time, and allows developers to scale up or down their requirements, and run on EC2 instances.
If you are a beginner to AWS, check out the ensuing YouTube video on AWS Kinesis Tutorial, and enroll in a good AWS certification course from Intellipaat, which is an industry-grade course, that offers you real industry-grade guided projects to enhance your hands-on experience.