You must have seen flags of Pakistan on the streets, buildings, roads etc of Azerbaijan. It's famous that people of Azerbaijan respect & regard Pakistanis a lot. Do you know why?

There are two main reasons:
1. Pakistan was the 1st country to recognize Azerbaijan in 1991...

...after the dissolution of Soviet Union. Pakistan started enjoying cordial relations with Azerbaijan since then & has always supported Azerbaijan in their conflict with Armenia over the disputed territories on international platforms.

2. After Turkey, Azerbaijan mostly...

...depends on Pakistan for purchase of military hardware. Azerbaijan recently showed interest in buying JF-17 Thunder Aircraft from Pakistan.