Google did show the causal link between the anchor text, Page B and Page C. The other search engines didn't have the page indexed: Results: After 14 days we could see Page B now showing up in the index for Google, but not Bing or Blekko. No search engine showed this phrase ranking in the first 50 results. Prior to beginning the test, we checked the anchor text phrase “Cara rides 100 days at bachelor” which does not show up anywhere in the source for Page B. Page C – The target page of the anchor text on Page B: Prior to the test, this page did not exist on the server and would have returned a 404 page: Ĭheck out Cara rides 100 days at BachelorĪnchor text – “Cara rides 100 days at bachelor” It has no prior traffic nor existed before we posted the iframe HTML on Page A. Page B – the same small traffic, long established website with a page newly created for this test (Page B). You need a Frames Capable browser to view this content. Page A – the same frequently updated blog And, would a link from the iframe source be followed and pass link equity to link’s landing page? The second test was to determine, through a steel-tight iframe call with no HTML text between the iframe tags, if the engines will crawl the iframe source links. However, these are not surprising results. Not only will it crawl the HTML within the iframe tag, it will attribute the anchor text to the proper page. This lets us know that they do crawl the HTML within the iframe tags. The test basically showed that the search engines are able to crawl the text within the iframe tag, but this wasn’t exactly the test we were trying to check. Google Webmaster Tools was able to pick up on the link: It picked up on the new link within three days of posting the iframe information. In Google, Page A (the blog with the iframe) also ranked for the phrase on the first page for the query. The search engines easily picked up on this link and the anchor text ranked on Google, Bing and Blekko for Page B. This should make the phrase unique to the anchor text. We created anchor text that doesn’t actually show up in the HTML source of Page B. We took a page that ranks relatively high for a particular local query. No search engine ranked Page B for the phrase “Sammy loves hiking south sister” in the first 50 results.Īdditionally, we used a small traffic site that has been up for at least 7 years and hasn’t had changes in the last 4 years. Prior to implementation, we tested the anchor text phrase against three search engines: Google, Bing and Blekko. HTML on Page B – Legacy blog post about hiking south sister. Page B – A small traffic, long established website page that has high-ranking terms for its subject matter.Īnchor text – “Sammy loves hiking south sister” This is the page where we added the HTML iframe tag: Page A – A trusted, frequently updated, and regularly crawled blog. The Setup: Two tests were conducted: one to determine if search engines grab information from the iframe tag itself, and the second to determine if the search engines will crawl the source of an iframe follow links from that source URL and index the page with the attributed anchor text from the links found on the source URL. This got us sufficiently curious, so we conducted a test of our own. Michael found that links within iframe elements were indeed crawled, also raising the question of whether or not equity passed through them (anchor text and PageRank). So you can imagine our intrigue when we read about a test that Michael Martinez had conducted over on SERoundtable. Those words were written nearly 3 years ago. For any given iframe, there may be 20-100 links featured (or more, depending on the content of the iframe).” Our recommendation at the time explained that “… press release pages are seen as linking to the customer URLs within the iframe and thus could be negatively impacting rankings for the individual releases. One good example of this is with, a site our team audited several years back. The use of iframes is widespread and there is nothing inherently wrong with the practice but they just don’t feel quite right from an SEO point of view, especially when there are lots of links and content in the iframe. That sequence of thinking is completely logical. Still, I’m going to recommend they use caution here. But crawlers can’t follow links within iframe elements, so they’re probably just a brick wall. You might think to yourself, “hmm something about these just doesn’t smell right. Consider this scenario: you’re auditing a site for SEO issues, and come across wide use of iframe elements on key pages.
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