How important is the 'Startup story'?

I would say pretty important! Story telling is crucial to get interest and buy-in. Most likely the problem you're trying to solve, came from an experience or a story. Tell that. Make it fun, friendly, and engaging!

I think 'Startup' story can be great for reading , connecting with people as it can help in increasing interest in company then it's product , how it was created , how product idea was generated , what was the story behind the name of the startup ,what were the struggle of the founder which can inspiring for people, etc.

I think story telling is super essential to entrepreneurs!

Extremely vital. Humans relate to stories, experiences, and perspectives of other humans. We don't relate to a website or an app. At the end of the day, whatever you're creating, you'll need buy-in from other humans and the best way to do that is create a compelling and powerful story that others can relate to in order to back your business or app.