What is the best Training Course I can get in the Salesforce?

Thank you for your invitation and I agree with Mr. Obaid

training course related to customer services & communication skills. 

I think it depends on what you plan to do . If you are interested in salseforce administration , the salesforce admin training would be a good option . If , howwever, you plan to work as a salesforce developer , then salesforce developer certification would be a better option.

The best training course you can get in salesforce online training at OnlineITGuru. Their years of experience in the IT Industry gives your career great boost. 

Trailhead and There are some good training course at UDEMY.

Updating Salesforce activities on daily basis.

THanks for invitation,

I do believe that you may start with a "Marketing Course" and then follow same by some "Soft Skills Courses" like, " Communication Skills", "Presentation Skills", and " Negotiations Skills", also you may add an "E - Commerce Course".