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1) As a user, do you expect to find all of the words in your query present at least once on the result page? (Personally, I do. It's up to me to broaden my search if I want to.)
2) Since this is clearly not true with Google, my next question is: why? Is that a feature that makes Google a better or worse search engine?
Imho, all the words shoud be there, not just in anchor text or whatever (perfect recipe for cheating, really).
>>Is that a feature that makes Google a better or worse search engine?
Think it's a mixed bag here. In a perfect world the more incoming links with relevant link text marks the site as an authority. In the real world this can easily be manipulated. G appears to be taking some steps to weed out possible non-relevant links -- guest books, blogs, etc.
I kind of think this is a very important period for G to get its results back on track and make the "I'm Feeling Lucky" button as relevant as it once was.
I think until Google gets their new system sorted out it will be this way.
Another example. Have a look on Google for 'search engine'. Next to none of the top results have both the words on the page (e.g. Google!) but they are undoubtedly the best matches for this search.
Not all search results need to have the word on the page, but it is striking a balance between off and on-page factors that is at the core of Google's relevancy.
Receptional Andy:
I am not sure that the top results in that case are the best matches (trying to guess why anybody would search for that). Are Google Groups relevant to search engines?
Let's use another example. What if someone searches for 'best search engine'? In that case, I would expect to find pages that discuss which is the best search engine. Instead, Google imposes at the top their (the most voted for) answer: Google!
It's a dangerous slope. Next, you'll search for blue widgets and get page after page of stuff exclusively about red widgets, just because these are much more popular. Yuk! Minimally, if most users are satisfied with such SERPs, give me a button to click on for the option: search for web pages that contain these terms.
You don't want domainX to come top for every search because it's the most important, but if BigWidgets.com make the best red widgets then it's good if Google can list them top with or without the word red in the page due to anchor text.
I like Andy's examples; the original favourite example was Bill Clinton. www.whitehouse.gov would come top at the time even though the US President's name wasn't on that page, so it was a good match. It still comes top, which isn't quite such a good match but overall the feature has been a useful part of Google's relevancy.
I think it's only us Webmasters who care about whether wordX is on a page ranking for a particular search. Most searchers just want to answer questions, find cheap holidays or whatever.
Exactly. So if I type 'best search engine' I want the best search engine to be returned, (based on the 'opinion' of the engine I'm using) just as when I type 'tallest tree' I want to find the tallest tree.
>>Google imposes at the top their (the most voted for) answer
I don't really agree with the use of 'imposed' there. Google didn't make all the links that say they are the best - their users did, and that's who they make results for. I think it should be said that however easy it is to manipulate results with linking, it is far easier to manipulate on-page factors.
>>It's a dangerous slope
If results are deteriorating as a result of incoming links, then this is because of webmasters and not because of Google. Although that said, perhaps Google will need to adjust the balance in order to combat this.
>>trying to guess why anybody would search for that
According to Overture (unreliable as it may be) there were just under 900,000 searches for search engine last month :)