Content Downloads refer to the number of users who download your marketing collateral such as eBooks or other lead magnets.
Most visited Pages refers to the top pages on your site that gets most visits in a given time period.
Content Pipeline refers to the time it takes between publishing new content on your website.
Search Engine Results Pages are Google’s response to a user’s search query. SERPs tend to include organic search results, paid Google Ads results, Featured snippets etc.