WordStream

I’ve blogged before about the most expensive keywords in search engine marketing. Back in 2009, it was “mesothelioma.”

Of course, that was eight years and a lifetime ago in the world of cyberspace. In the meantime, asbestos poisoning has become a much less lucrative target of ambulance-chasing attorneys looking for multi-million dollar court settlements.

Today, we have a different set of “super-competitive” keyword terms vying for the notoriety of being the “most expensive” ones out there. And while none of them are flirting with the $100 per-click pricing that mesothelioma once commanded, the pricing is still pretty stratospheric.

According to recent research conducted by online advertising software services provider WordStream, the most expensive keyword categories in Google AdWords today are these:

“Business services”: $58.64 average cost-per-click
“Bail bonds”: $58.48
“Casino”: $55.48
“Lawyer”: $54.86
“Asset management”: $49.86

Generally, the reasons behind these terms and other terms being so expensive is the dynamic of the “immediacy” of the needs or challenges people are looking to solve.

Indeed, other terms that have high-end pricing include such ones as “plumber,” “termites,” and “emergency room near me.”

Amusingly, one of the most expensive keywords on Google AdWords is … “Google” itself. That term ranks 25^th on the list of the most expensive keywords.

[To see the complete listing of the 25 most expensive keywords found in WordStream’s research, click here.]

WordStream also conducted some interesting ancillary research during the same study. It analyzed the best-performing ads copy/content associated with the most expensive key words to determine which words were the most successful in driving clickthroughs.

Running this textual analysis found that the most lucrative calls-to-action included ad copy that contained the following terms:

- Build
- Buy
- Click
- Discover
- Get
- Learn
- Show
- Sign up
- Try

Are there keyword terms in your own business category or industry that you feel are way overpriced in relation to their value they deliver for the promotional dollar? If so, which ones?

It’s no secret that Google has been trying to diversify its revenue stream away from clickthrough advertising, which historically has accounted for the overwhelming majority of its income.

How else to explain Google’s shopping spree over the past decade, scooping up a veritable smorgasbord of industry players like these:

AdMob (mobile)
Adometry (attribution)
Channel Intelligence (product feeds)
DoubleClick (display)
Invite Media (programmatic creative and media buying)
Teracent (programmatic creative and media buying)
YouTube (video)
Wildfire (social)

So the next question is, “How much have these acquisitions and investments done to diversify Google’s sources of revenue?”

The answer: Hardly anything.

Consider this statistic: In 2011, nearly all of Google’s revenue came from online pay-per-click advertising, as reported by SEO firm WordStream.

Now let’s look at 2014 figures: WordStream reports that the percentage of Google revenues from pay-per-click advertising is actually higher than in 2011, at 97%.

So much for the “diversifying effects of diversity.”

Within PPC advertising, a number of keyword terms are continuing to haul in the big bucks for Google. A few years back, the priciest keyword term of all was mesothelioma, at more than $100 a click.

Mesothelioma continues to attract a lot of ad dollars, but it’s no longer commanding $100 a pop as it once did. In fact, it’s no longer on the Top 10 most expensive keywords list.

That list looks like this now (in descending order of bid pricing, starting at over $50 per click and dropping to “only” around $45 for the #10 keyword):

Insurance
Loans
Mortgage
Attorney
Credit
Lawyer
Donate
Degree
Hosting
Claim

In developing the ranking, WordStream determined which keywords reside in the stratosphere by compiling data from its own large keyword dataset and the Google Keyword Tool (over a 90-day period) to determine the 10,000 most expensive keywords.

These were then organized into categories like “credit” and “insurance” by weighting the number of keywords in each category, estimating the monthly search volume as well as the average cost-per-click for each keyword.

Notice the preponderance of financial and legal terms – both of them key to sectors that attract and manage a ton of money.

The word degree is right up there, too, underscoring how important the educational complex has become to the ad business.

It must be pretty unappealing to be active in these industries and have to pony up such big dollars to participate in the pay-per-click advertising space. But how else do we think Google racks up annual advertising revenues that are north of $32 billion?

How does the market sort out which keywords are worthy of commanding $40 or $50 per click? Essentially, it boils down to this: Invariably, the most expensive niches paying for the most costly keywords are ones with very high lifetime customer value – where the customer pay-off is high.

Think about it: The amount of money an insurance company gets from an individual signing up for coverage makes the high cost-per-click rates – even at $50 a pop — worth it.

Business observers point to long-range trends that may make search engine marketing increasingly irrelevant as the growth of multichannel, multi-device marketing picks up steam.

But don’t hold your breath; Google will likely be earning billions off of pay-per-click advertising for years to come.