Why do we need to handle Header parameter 'SLUG' while playing around with images?

Hello Guru's,

While carrying out GET and POST operations on Gateway (Eg: This one).. I saw mostly use of SLUG header parameter handling.

Why is it used?

What is the impact of it?

Can we Make 'custom header parameter' behave as SLUG header parameter ?

Also few pointer to material docs would be helpful.

Thanks for read and would appreciate your response.

Pavan G

Message was edited by: Pavan Golesar