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hello everyone in this video we are going to learn about behavior subject so by the definition behavior subject is a type of subject the subject is a special type of observable so you can subscribe to message like any other observable mainly the use of a behavior subject once you want to broadcast your masses then you can give for behavior subset just like just take a take an example you have a five components and you want to display the same message for every component so that times you will use that behavior subject so letamp;#39;s say with example how you can do just creator first we are going to display that broadcast that message with the a two component so I am going to create the two component to generate component first component now Iamp;#39;m going to create second component for the behavior subject we need to use one service so theater subject service and regenerate as for service that like user service so here in the source folder you will see that there is a have first c