When would this be useful? If your site has a blog with public commenting turned on, links within those comments could pass your reputation to pages that you may not be comfortable vouching for. Blog comment areas on pages are highly susceptible to comment spam. Nofollowing these user-added links ensures that you're not giving your page's hard-earned reputation to a spammy site.
A little more than 11% of search results have a featured snippet. These are the results that show up on search engine results pages typically after the ads but before the ranked results. They’re usually alongside an image, table, or a video, making them stand out even more and putting them in an even better position to steal clicks from even the highest ranked results.
We expect advertisements to be visible. However, you should not let the advertisements distract users or prevent them from consuming the site content. For example, advertisements, supplement contents, or interstitial pages (pages displayed before or after the content you are expecting) that make it difficult to use the website. Learn more about this topic.38
Reviews are important to your small business because having reviews—especially positive reviews—is a ranking factor on Google. People are also more likely to click and visit your business if it’s listed with a lot of good reviews. To get reviews, start by asking your loyal customers and even your staff to leave reviews on major sites such as Google and Yelp.
Many blogging software packages automatically nofollow user comments, but those that don't can most likely be manually edited to do this. This advice also goes for other areas of your site that may involve user-generated content, such as guest books, forums, shout-boards, referrer listings, etc. If you're willing to vouch for links added by third parties (for example, if a commenter is trusted on your site), then there's no need to use nofollow on links; however, linking to sites that Google considers spammy can affect the reputation of your own site. The Webmaster Help Center has more tips on avoiding comment spam40, for example by using CAPTCHAs and turning on comment moderation.
Killer post, Brian. Really want to know how to create those charts you keep using throughout your posts. I searched Google for them but couldn’t find them so I’m guessing they’re custom designed but with what tool is the question… Would love to see a flat architecture diagram for blogs and non-ecommerce sites. Look forward to your upcoming Blab with Dmitry.
Keep in mind that the number of average monthly searches for each suggested keyword is an estimate. However, it does represent the popularity of that keyword or search term. This makes a difference when doing your keyword research, as it gives you insight into what people in your market are searching for. Understanding what they want allows you to better position your business to provide them with relevant content and information.