How to determine the ranking difficulty of a keyword
Most SEO professionals judge the “ranking difficulty” of a keyword by analyzing the pages that already rank in Google for known factors that correlate with rankings. This essentially boils down to 4 main attributes:- Content of the page
- Searcher intent
- Links from other websites
- Domain/website authority
1. Content of the page
Google doesn’t rank irrelevant pages. But how do you make your page relevant to a target keyword? I have a better question for you: How do you make your page NOT relevant to a target keyword? Case in point: we recently published an article about 301 redirects with the aim of ranking in Google for “301 redirects.” Because the overall topic of the post and the target keyword align so closely, there was literally no way to write this post while simultaneously making it irrelevant to the target keyword. See where I’m going with this? If you write an article and target a specific keyword, it will inevitably be relevant to that keyword. Yet, most on‐page SEO advice states that you need to mention your target keyword in the following places to increase your page’s relevance in the eyes of Google: But isn’t that a given? Aren’t you likely to do those things anyway? For example, I’m 500 words into this post about “keyword difficulty” and I’ve mentioned that keyword seven times already, despite making zero effort to do so. It happened naturally. Years ago, things were different. You could indeed fool Google with these kinds of tricks. If you wanted to outrank your competitor, mentioning your target keyword more times than them and stuffing your title tag with keyword variations was the name of the game. But those days are long gone. Google is now smart enough to pull tricks like this one: Here, the #1 search result for “guest writing” doesn’t have that keyword in its title. But, wait for it… There’s also not a single mention of the keyword “guest writing” anywhere on that page! Clearly, Google is smart enough to understand synonyms and figure out that “guest writing” and “guest blogging” are the same thing. So, if you still see the absence of the target keyword in the title tag across top‐ranking pages as a sign of low keyword competition, then think again. When analyzing a keyword, you shouldn’t pay much attention to how many times and where your target keyword is mentioned on a page. Instead, you should dig into the content of the top‐ranking pages to determine whether they’re written by someone with good knowledge and understanding of the topic at hand, or churned out by a $3/hr freelance copywriter. The quality of your content and value that it brings to readers is what gives you a competitive edge, not “strategic keyword placements.”Tim, are you trying to say that Google is smart enough to read the actual content of a page and identify if a person with domain expertise wrote it or just a random copywriter?No. I’m pretty sure Google can’t do that. Otherwise, they wouldn’t allow a “lorem ipsum” website to outrank legit sites. But I do believe they have enough factors baked into their algorithm to allow them to “guesstimate” the depth, authority, and trustworthiness of a given piece of content.
What about things like LSI and TF*IDF?
At this stage, some of you may be wondering about our stance on those on‐page SEO tools that claim to help you win in the search results by sprinkling the “right” words into your content in the right quantities. Most of these tools claim to use smart‐sounding technologies like LSI or TF*IDF to help do this. So here it goes… Google almost certainly uses a word vector approach (for RankBrain), but there’s no evidence to suggest that they use LSI. In fact, given how LSI works, all evidence points to the contrary. So there’s not much point in using those LSI keyword tools to generate keywords to include in your content. As for TF*IDF, that one’s a bit more likely, but still… Here at Ahrefs, we don’t recommend obsessing over fancy‐sounding hacks like this. We believe it makes more sense to focus on crafting excellent content and a fantastic user‐experience above all else. In other words, we don’t believe there’s a way to quantify the “relevance score” of your content and win in the search results by improving a that score, especially given the “searcher intent” factor that I’ll discuss in just a moment.2. Searcher intent
Here’s our ranking history for the keyword “backlink checker” as seen in Ahrefs Site Explorer: Back in February 2017, we published a landing page with the aim being to rank for the keyword “backlink checker.” The content of that page was perfectly “optimized” for its topic, as we described the awesome backlink research features that we have in Ahrefs. A couple of months after publishing (and thanks to some smart internal linking), our page climbed to position #5 for its target keyword. We were ecstatic! But that didn’t last long. Just a few days later Google started pushing us down, and quite soon we found ourselves on the second page of search results (which is the best place to hide dead bodies). Being the “professional SEOs” that we are, we started optimizing that landing page with every trick in the book. We:- Improved the copy of the page;
- Improved the load speed;
- Improved “mobile friendliness;”
- Worked on acquiring quality backlinks;
- Etc.
Reason being, Google clearly isn’t happy with the current results as it chooses not to rank any one of them at the top for more than a few days at a time. So, if you can crack search intent, the ranking is yours for the taking. But, while this is the case, it can also indicate a difficult to crack SERP. That’s because Google has no clue what searchers are after, and most likely, neither do you. It may also be the case that search intent is continually changing, in which case ranking long‐term will be next to impossible.This SERP has opportunity written all over it pic.twitter.com/dZ5nj5rQ06
— nick eubanks (@nick_eubanks) April 20, 2019
3. Links from other websites
Finally, we move from the more abstract concepts like “quality content” and “searcher intent” to something much easier to measure: backlinks. Links from other websites are an essential part of Google’s ranking algorithm (see my post about PageRank for more details). Google sees them as “votes” that mean your page deserves to rank high. But, of course, Google’s algorithm doesn’t only count the raw number of websites linking to a page—it’s way more sophisticated than that. The “quality” of the linking page also matters, along with things like:- The number of other sites to which the linking website links
- How deeply buried in the website’s structure your link happens to be
- The actual context and anchor text of that link
- etc.
We estimate that you’ll need backlinks from ~247 websites to rank in top 10 for this keyword.That is a very carefully crafted phrase. Let me break it down for you:
- “We estimate…”—This means that we’re not 100% confident in the statement that follows. It’s just an educated guess.
- “…you’ll need backlinks from ~247 websites…”—The critical part here is that “~” sign right before the number. It means “approximately.” So this number should not be treated as a precise one.
- “…to rank in top 10 for this keyword.”—We estimate that you will rank in the top 10 if you can convince that many websites to link to your page. But we can’t promise you’ll rank #1 or even in top 5.
But until we do this (which will no doubt take us some time), our Keyword Difficulty metric is likely to stay purely link‐based.Ahrefs is working on general purpose search engine to compete with Google. Sounds crazy, right? But lets talk about two huge problems with Google which they will never want to fix:
— Dmitry Gerasimenko (@botsbreeder) March 27, 2019
“Which Keyword Difficulty should I target with my website?”Ahrefs’ KD metric is basically a proxy to an average number of backlinks across the top 10 ranking pages. Specifically: KD 0 = 0 Ref. Domains KD 10 = ~10 Ref. Domains KD 20 = ~20 Ref. Domains KD 30 = ~35 Ref. Domains KD 40 = ~55 Ref. Domains KD 50 = ~80 Ref. Domains KD 60 = ~130 Ref. Domains KD 70 = ~200 Ref. Domains KD 80 = ~350 Ref. Domains KD 90 = ~800 Ref. Domains So the answer to this question comes down to how many backlinks you can acquire to the pages on your website. To get a rough sense of this, paste your domain into Ahrefs Site Explorer and go to the “Best by links” report: On the screenshot above, you can see that our blog homepage has backlinks from 957 different websites (referring domains), but the five most‐linked articles have 453–670 backlinks. So it seems like we can safely target keywords with KD score of up to 90 on our blog, right? Not quite. Those are our five most‐linked articles. It took us many years of blood, sweat, and tears to generate that many backlinks to each of those posts. If you scroll down that report, you’ll see that the vast majority of our articles have fewer than 100 backlinks. So I’d say that the KD score that we can comfortably target is anything up to 50. Do this exercise with your website and see how many backlinks your pages have.
4. Domain authority
This contributing factor is likely the most controversial of all. While the majority of SEO professionals believe that Google has some kind of domain‐wide quality metric that influences every page on a given website, Google’s representatives consistently manage to evade giving a direct answer when asked about this. Here’s a good example: Google’s John Mueller replied to my tweet about domain authority, saying that while they don’t use this metric per se, they do sometimes “look at things a bit broader.”¯\_(ツ)_/¯ But if you ask me what the Ahrefs team thinks about the influence of “domain authority” on a page’s ranking position, I’ll give you three statements:We don’t use domain authority. We generally try to have our metrics as granular as possible, sometimes that’s not so easy, in which case we look at things a bit broader (eg, we’ve talked about this in regards to some of the older quality updates).
— 🍌 John 🍌 (@JohnMu) April 16, 2019
- We believe that Google sometimes gives preference to pages on “strong” websites in the search results. But it’s tough to tell whether this is the result of a clear preference for high‐authority sites on Google’s part, or whether there’s some other indirect cause—like a preference for results from well‐known brands for some queries.
- We believe in the effectiveness of internal linking for “strong” websites. In other words, we think that websites with “powerful” pages can funnel some of that “power” to other pages via internal links, thus helping them to rank higher in Google.
- We believe that a page on a “weak” website will outrank one on a “strong” website if it has more high‐quality backlinks in comparison.
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