What is the title segwit and how it is created please help
For a newbie user, without any past knowledge on Bitcoin, you don't need to understand details about segwit.
Segwit is just an upgrade on the code to allow more transactions to be fit in the same block, reducing transaction fees. To know if someone is using segwit (and lower fees) you just need to look at their addresses: if it starts with 3 or bc, it's segwit. If it starts with 1 it's not segwit (legacy)