Social Media Marketing Guru

Looking for an experienced social media expert to help analyze and determine which are ideal words to tag and use in posts/descriptions, etc... for YouTube, Pinterest, FB, Twitter and website posts. Would need to create headlines and product descriptions/posts using keywords.

I will have a set of posts for a particular topic such as pain and will need help crafting a headline, description, using keywords and finding the right tags that best to use for a each social media platform. Need both specific and more universal tags.