Posted by sam.nemzer As of June this year, Google is now grouping keyword volumes for similar keywords in Keyword Planner. I wanted to investigate whether or not this is having an impact on the pages that rank for these similar, grouped keywords. My hypothesis is that, given that Google is associating keywords closely enough to group their volumes, we should expect that the search results would be very similar too. What has Google changed and why does it matter?The grouping of keyword volumes is a problem for anyone working in search because Keyword Planner is the primary source for volume data that we use in keyword research, whether that be from Keyword Planner directly, or through a third party tool that takes Keyword Planner data as its input—such as SEMRush, BrightEdge or SearchMetrics. By "grouping keyword volumes," we mean that different keywords that are slightly different (but generally convey the same meaning) are given the same volume, which represents the combined volume of every variation. For example, if (hypothetically) [SEO] is searched 21,000 times per month in the UK, and [Search Engine Optimisation] is searched 12,100 times per month, once these keywords are combined, each will be reported as receiving the total of the two—33,100 searches per month.\ On top of this, in the last few weeks Google have also been reducing access to keyword planner data for some accounts. Earlier this month, it was announced that Keyword Planner data will be given only in very broad buckets for advertisers with "lower monthly spend" (although some ways around this have been found). This is a separate change from the volume grouping, which is the main focus of this article. The fact that Google is grouping keyword volumes in this way implies that they see these keywords as equivalent, at least to some extent. The questions that this raised for me were:
There is further reason to think this way given the simple fact that Google is always getting smarter. As well as Parsey McParseface, the English language parser that Google released to the public, much of the research output that we see in patents and journal articles from Google relates to natural language processing, so it is clear that this is an area that Google see as a priority for their research. One way to test whether or not Google does indeed consider grouped keywords to be identical is to look at search results. The theory is that if keywords are viewed identically, we should see exactly the same pages ranking for the keywords. What's going on in the SERPs?I did a similar analysis a few months ago, which was focused more on general distinctions between keywords within a topic. This analysis is much more focused on the types of variations of keywords that we are seeing being grouped. These types of variations were categorised by, among others, Jennifer Slegg at The SEM Post. The five types of variations that I've looked into for this analysis are the following:
For each of these five categories, I put together a list of 50-100 keywords, along with a variation for each. Within these keyword pairs I investigated whether or not Keyword Planner reported the same volume, and also used the rank tracking tool STAT to see what pages are ranking for each keyword. From that analysis, I was able to measure the prevalence of grouping keyword volumes within each category (i.e. the percentage of keyword pairs that have grouped volumes), and the similarity of the SERPs (the number of top ten results that were shared between the two keywords) for grouped and ungrouped keyword pairs. ResultsThe results for those metrics are the following: I also looked at how common it is that SERPs are exactly identical, that is that the top ten results are the same pages, in the same order. This showed an interesting pattern. There are only two categories with significant numbers of identical SERPs—Punctuation and Typos. In the case of keywords with and without punctuation, you are more likely to see identical SERPs (implying that Google sees the pair of keywords as identical) if keyword volumes are grouped than if they are not. This is not a hard-and-fast rule though – there are still some ungrouped keywords which have identical SERPs. In the case of Typos, there are no grouped keyword pairs at all that have identical SERPs. Given also the low prevalence of grouped keywords in this category, it appears that the identical SERPs are coming from "showing results for" SERPs, where Google replaces results for the mistyped keywords with the correct one. What conclusions can we draw?
What should we take away from this?What does this mean for SEOs doing keyword research? Rank tracking companies such as STAT are looking into ways of splitting keyword volumes between the constituent keywords, so there is hope for at least semi-accurate volume data. What it does mean is that we should ignore the grouped volumes when targeting keywords—just because keywords are given the same volume, it doesn't mean you shouldn't target them individually on your site. On a wider scale, this tells us something about how the anthropomorphised "Google" thinks and works. There are two very separate factors at work here—what Google tells us, and what we actually see. This is something Rand picked up on in his recent Whiteboard Friday, and it applies across all of search—Google tells us one thing, but search rankings don't necessarily behave the same way. This backs up my belief to never take anything at face value, and always do your own research. Do these results surprise you as much as they do me? Let me know in the comments. Sign up for The Moz Top 10, a semimonthly mailer updating you on the top ten hottest pieces of SEO news, tips, and rad links uncovered by the Moz team. Think of it as your exclusive digest of stuff you don't have time to hunt down but want to read! via The Moz Blog http://tracking.feedpress.it/link/9375/4445461
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