Click-through-rates for social media refers to the number of followers who click a link on your social post that takes them to your website or blog
View-through conversions refer to people who saw your ad but do not click. However, they end up visiting your site at a later time.
Average Position metric tells advertisers which position in the search results their ad is shown in most of the time.
Cost-per-click refers to the exact money spent on advertising to generate a single click.