Unable to understand the API Key Patterns

[Bizzah_Batool]

What do we mean by the patterns referred to here:

;;;key;;;
<>
==key==
{{key}}

Can I please have more context here or any related article that can help me understand this?

Thanks

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Course: https://www.educative.io/collection/6630002/5684049913839616
Lesson: https://www.educative.io/collection/page/6630002/5684049913839616/5517095610613760

[Asma_Yasin]

This is just a convention used on this platform to use API keys in the code.

[Bizzah_Batool]

okay, got it.
Thanks