Your content is the information that your human visitors read, while meta tags are mostly directed information seekers and specifically to its tracker software, known as search engine spiders, which capture the info and carry to be offered to those who need or rather, have sought.
Meta tags are:
The title tag - This is the title of the particular web page;
The description tag - This is the information presented in the search results pages, and can provide a great opportunity for search engine optimization;
Keywords - These phrases and words that apply to your industry or niche, and are often used by your customers or supporters. The best keywords are to be lucrative, but should not have much competition.