Casting a stream to your television is a child’s play.
On your smartphone you’d need to search for the option Cast, Screencast, Mirroring, Screen Mirroring, etc.
Please note that the name may vary from brand to brand. In most of the smartphones the option is also available under the control center.
You would then need to select the name of the Smart TV or Device you wish to cast your screen on and follow the suggested steps.
It is important that your smartphone and the device you are planning to cast it on are connected to the same WIFI network.
You can also connect your laptop to the television with the help of a HDMI cable.