Nearly 15 years ago, the nofollow attribute was introduced as a means to help fight comment spam. It also quickly became one of Google's recommended methods for flagging advertising-related or sponsored links. The web has evolved since nofollow was introduced in and it's time for nofollow to evolve as well. Today, we're announcing two new link attributes that provide webmasters with additional ways to identify to Google Search the nature of particular links. These, along with nofollow , are summarized below:. When nofollow was introduced, Google would not count any link marked this way as a signal to use within our search algorithms. This has now changed. All the link attributes— sponsored , ugc , and nofollow —are treated as hints about which links to consider or exclude within Search. We'll use these hints—along with other signals—as a way to better understand how to appropriately analyze and use links within our systems.
1. Search engine country-code domains
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At the recent Search Engine Strategies conference in freezing Chicago, many of us Googlers were asked questions about duplicate content. We recognize that there are many nuances and a bit of confusion on the topic, so we'd like to help set the record straight. Duplicate content generally refers to substantive blocks of content within or across domains that either completely match other content or are appreciably similar. Most of the time when we see this, it's unintentional or at least not malicious in origin: forums that generate both regular and stripped-down mobile-targeted pages, store items shown and -- worse yet -- linked via multiple distinct URLs, and so on. In some cases, content is duplicated across domains in an attempt to manipulate search engine rankings or garner more traffic via popular or long-tail queries. Though we do offer a handy translation utility , our algorithms won't view the same article written in English and Spanish as duplicate content. Similarly, you shouldn't worry about occasional snippets quotes and otherwise being flagged as duplicate content. Our users typically want to see a diverse cross-section of unique content when they do searches. In contrast, they're understandably annoyed when they see substantially the same content within a set of search results.
Do I still need to flag ad or sponsored links?
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Trust Flow represents the quality of links that point to URLs and websites. A web page with higher Trust Flow than Citation Flow will usually have good-quality links. Citation Flow is a score which reflects the quantity of links that point to any given website. Citation Flow does not care whether a link is of good-quality, or poor quality. The Visibility Flow score helps you to find desirable editorial-style links on high Trust Flow pages, rather than directory-style links even when the directory Trust Flow is high. With a score that shows where a website is positioned compared to the very best sites in over categories, Topical Trust Flow illustrates the topical relevancy of a web page. Each score represents a different measure of the impact of your content.