Difference Between Web Research and Content Management: Key Insights

What is the difference between Web Reseach (claygent) and content creation, manipulation, and categorization. For example, if i want AI to go into each webiste and find out the product name of their best sellers if there is a best seller tab then which one should i use. Also, where theres not an option to give examples in clyagent? I am confused about a thing, for claygent, it says it has access to internet? what does that mean exactly as the other option can scrape website and get product names using the domain, that means the other option has access to internet too?