Congrats on your new business.  This is a big question and something that would depend on the type of business and your goals.  A great place to start is the Klaviyo Academy.  Check out this course:

https://academy.klaviyo.com/developing-a-content-calendar

Also, check out this podcast:

Hey @sdhar 

Congratulations on your new business! Thank you so much for reaching out to the Klaviyo Community to help you get started on your digital marketing journey!

As @Mailbox Manny already shared, your content strategy really depends on your type of business and your goals. The links that Manny included will be very helpful to get started. There are many Academy courses that can help you understand and build your marketing strategy.

https://academy.klaviyo.com/guide-to-building-a-brand-voice

https://academy.klaviyo.com/developing-a-user-generated-content-strategy

https://academy.klaviyo.com/page/black-friday-cyber-monday-marketing-strategies

https://academy.klaviyo.com/page/holiday-marketing-strategies

Also check out our Marketing & Sales section of the Community where you can ask questions and collaborate with peers on strategy. 

I hope this helps, thank you for being part of the Klaviyo Community!