These add review stars to snippets and increase click-through rates. I have tested many rich snippet plugins over the years and my favorite (and what I use now) is the WP Review Pro Plugin by MyThemeShop (view the demo). It’s fast, looks great (here’s a page I use it on), comes with 16 pre-styled designs, supports user reviews, and is well-supported by the developers at MyThemeShop. I was previously using WP Rich Snippets but the developer abandoned the plugin and hasn’t updated it for 2 years, and All In One Schema lacks customization options.
MozBar – MozBar is a Google Chrome extension that lets you Google any keyword and see how competitive the search results are. The higher the DA (domain authority) and PA (page authority) the more competitive the keyword is. However you still want to click on the top results and browse the content to make sure you can creating an article/video that is better than whoever’s in the top results. That is really what “researching the competition” is all about.
"News Feed Ads", also called "Sponsored Stories", "Boosted Posts", typically exist on social media platforms that offer a steady stream of information updates ("news feed") in regulated formats (i.e. in similar sized small boxes with a uniform style). Those advertisements are intertwined with non-promoted news that the users are reading through. Those advertisements can be of any content, such as promoting a website, a fan page, an app, or a product.