Customer Q: Is there a way to have the email campaigns to go directly to customers main...

Customer Q: Is there a way to have the email campaigns to go directly to customers main inbox instead of the "promotions" inbox.  i dont think majority of the customers  are seeing them.

Unfortunately, no. This is managed by the email providers. Many use an algorithm that classifies commercial content, deals, and offers as promotional, sorting them into the Promotions tab to keep the user's primary inbox focused on personal communication. Transactional email, on the other hand, would not be considered marketing and should hit the customer’s inbox.