[FR]: Add a description of Pattern matching

[imranaai]

Is your feature request related to a problem? Please describe.
There is no description or introduction to the topic in the Pattern matching section it would be great if someone add it.

Describe the solution you'd like
A clear and concise description of the topic would be good, adding introduction of the topic is essential to increase the code usability and accessibility for every possible user.

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
All the contributions are appreciated.

[github-actions]

Stale issue message