Google pioneered the model of judging a pages worth by primarily letting other people do it for them. (All the big search engines have long since followed.) Search engines, at their most basic level, rank pages by looking at how many incoming links they have. Yes, the web is a popularity contest.
Of course it’s more complicated than that. Search engines also assign all those incoming links or votes for your content a quality score by looking at how many incoming links the pages doing the linking have, they also look at link structures, link content, reciprocal links and on… and on… and then on some more. Links are the most important aspect of search engine marketing. With enough quality incoming links, nothing else matters. In fact, the Incoming Links portion of the Voltmeter makes up more than half of the total score.
This all makes sense of course. The easiest way to automate a process that’s impossible to automate (like objectively determining the quality of human-generated information output) is getting a real person to do it for you. Preferably someone else; or in Google’s case, everyone else.
Why does Voltmeter check the link sources it does? Not all links are created equal. Like I said earlier, the engines check your links’ links, they check domain histories, hypertext composition and so much more…
Total Incoming Links
We have to apologize up front because this number will never be consistent or correct. No searche engine has ever indexed the entire web, so no one actually cn tell us the total number of incoming links. We can provide you with the closest approximation available and that’s from Yahoo! Site Explorer. Their index is massive and their resources are many, so this is the best place to check for an overall idea of how many total incoming links a site has.
Wikipedia
Wikipedia links are a good measure of if you’re providing any sort of authoritative information on your website. Is what you have to say some combination of unique and valuable? If so you probably have a lasting Wikipedia link or two. Wikipedia links are fairly controversial in search marketing circles because I can go ad some Wikipedia links to any site I want right now. But even if I do, they won’t be there for long unless they actually add something to the what’s arguably the largest, most current knowledge pool online. So we check them when running the Voltmeter test.
DMOZ
Remember how we said the best way to automate something was to have someone else do it? Well some search engines don’t give two licks about automation. DMOZ is one of them, if not the one of them. DMOZ hand-selects every single website that it admits to its search index. If you want your site in the DMOZ directory, first you or someone else has to go and suggest your URL be included in the DMOZ index. Then it goes into a long queue until a real life human looks it over and decides whether it’s up to snuff or not. This can take weeks or it can take months, but we highly recommend it and we have Voltmeter check for DMOZ links, because they are likely the most trusted links available.
Google News
Google News tracks all kinds of news sources from TV stations to newspapers to online wire services. Checking for links to your site here is sort of a shotgun approach to checking for mention of your URL in traditional media. These links are usually pretty high quality just because we know for a fact that no link farms or other shady links sources are tracked by Google News.
Google Blog Search
Google Blog Search is just like Google News, but for blogs only. So if you can get the fickle, echo-chamber, rumor-mongering blogosphere talking, you’ll get some link-love from this area of the net. These links are usually pretty easy to come by with a minimal investment in some good link-bait. (Despite the negative connotations of the word baiit, we’re big into link bait around here. This is something we define as content compelling enough to spread on its own. Link-bait and viral content are pretty much the same thing. The Voltmeter itself is link bait. It’s useful, easy to use and looks good.)
Google Domain Mentions
This is sort of the catchall for anything we may have missed. This searches Google for your domain. So if we were looking for domain mentions of this site, we’d go to Google and search the term, “360voltage.com” (quotes and all) and see how many hits we got. This important because even if someone isn’t directly linking to you, this is the second best thing, it’s more than text, but not quite a hyperlink.
In Summary
Links are the thing. They are the currency of the net. You want as many links as you ca get from as many different reputable sources as you can get. (No link buying or link-farms.) If you only invest in one area of search marketing, make it link-beggingbuilding. I’ll say it again: with enough high quality links, nothing else matters.