Firstly, Take your smart speaker and connect it with any power source. As you do that you will see an LED light circle on the top.
Once the blue light turns to orange, it denotes that it is ready to setup. Ensure that you tap on the correct Echo device.
After Amazon Echo Setup, Alexa app for echo dot is ready to use. Say the wake word and it’s to show its functionality.
Also, Know about Alexa app for pc and how to set up echo dot 3rd generation. How to set up echo dot?