We get this question a lot from our clients and friends. Like everything there isn’t a simple answer, but let me shed some light on how we work toward getting a good answer to this question.
The primary consideration is usually how you monetize your website. In many cases it is hard to draw a line from a paid search visit to cash in your hand, however, you should get as close as you can. Once you have your best effort to track that in place (probably with web analytics) you will have to make some assumptions that you can test over time.
For example, we may assume that 1 out of every 100 persons that sign up for the newsletter eventually purchase our product. If the average product price is $1000, we would presume that a newsletter sign up has a value of $10. This analysis is not perfect, but it does reflect the reality that leads who buy “subsidize” the leads who do not buy (more on that in a second). Your number will get verified and refined as you evaluate it from week to week.
Businesses who do the bulk of their business online will not have to make these leaps of faith, and therefore will have better information for making marketing decisions – lucky!
One last note on monetizing your site, if you make your money via advertising you need to determine how much you make per pageview.
Now that you have some semblence of how your site value you can start to analyze whether you should increase your AdWords budget. Get the following information from your analytics and from the computation discussed above:
- AdWords cost
- Number of conversions resulting from AdWords (separate different types of conversions)
- Value per conversion type (each type of conversion will have a different value)
Using this information you can calculate how much each conversion type costs (AdWords Cost/AdWords Conversions). Now compare the cost to the value (Total AdWords Conversions Value/Total AdWords Cost) — this number, I call it Return on Ad Spend, tells you how much money you make for every dollar you spend on AdWords.
Now, be careful not to bet the farm on your ROAS, because it doesn’t take into account your overhead, variable costs, or paid search management fees. It also doesn’t account for people that were introduced to your website via AdWords, left, and then came back by Organic Search or Direct URL, they will overwrite the original source :-(. So, your ROAS is an approximation, but it gives you a better feel for cost and value.
Notice I didn’t say anything about optimizing your ads or campaigns, because that is next…. If you are pleased as punch with your ROAS, increase your budget to the point of diminishing returns, which may come sooner than you think.
If you aren’t confident that your ROAS is optimized start by improving your quality score on the expensive words and eliminating non-performing words.
I promise if you start looking at this information you will get a feel for how your AdWords campaign is really performing. As a general rule, when we do this sort of analysis for our customers we end up optimizing their AdWords account rather than increasing the budget, which increases their ROAS, and it usually ends up that they don’t need to increase the budget to increase profitability! When we do recommend a budget increase it is typically because their AdWords efforts have higher conversion rates than their other online marketing efforts, not just because they have a high ROAS.
So, I hope this helps at least a little bit. I know it isn’t the silver bullet, but it is a start :-).