At the heart of any PPC advertising campaign are keywords, and finding the most relevant and productive keywords for your customer base needs to be an ongoing process for your business to ensure that your ads get in front of the people most interested in seeing them—and at the most opportune time.
But search habits and patterns can change over time, and keywords that performed successfully for you last year might not produce the same results today. Likewise, effective keywords in one region you serve might return lackluster results in another. Fortunately, help is at hand to make staying on top of your keyword strategy easier. Google Adwords’ powerful (and free) keyword research tool,
Google Insights for Search, provides valuable data to help you analyze, refine and grow your keyword lists.
In this post, we’ll look at what kind of tool Insights for Search is and introduce an example to see how it works. Next time, we’ll look at additional features of the tool.
What Is Insights for Search?Insights for Search is a tool that analyzes Google search data to compute the popularity of search terms relative to the total number of Google searches over time. The tool lets you see trends, top searches, related searches and searches that are rapidly gaining in popularity. You also can compare search trends across multiple terms, vertical markets (categories), geographic locations and time ranges. Let’s look at a few simple examples to see how you can use the tool to refine your keyword strategy.
What Can Insights for Search Help You Do?Suppose that you own a plumbing, heating and air conditioning company in Maryland that serves the Washington, D.C. metropolitan area. Some of the keywords in one of your “plumbing” PPC campaigns include
- hot water heater
- gas water heater
- electric water heater
- tankless water heater
Interest over time. First, let’s check the search interest in these keywords over time. Insights for Search data goes back as far as January 2004, and is updated daily. Here are the results showing US interest in the keywords since January 2004.

Interest in the keywords has stayed fairly consistent over time, with “tankless water heater” and “hot water heater” showing higher search volume than “gas” or “electric.” You can also see that interest in “tankless” took off in December 2005 (where the dots are), and is continuing to grow. If Insights for Search has enough data, it will include a future prediction for the term. The dashed lines on the right end of the graph show predicted interest for next year for the four terms.
Top related searches and rising searches. Next, let’s view the top search terms related to “tankless water heater” to see whether we find other popular terms that we need to add to our “tankless” keyword set. Scrolling down the page and selecting “tankless water heater” from the Search terms drop-down menu brings up two lists: Top searches and Rising searches from January 2004 to the present.

The Top searches list displays the most popular terms related to “tankless water heater.” These are terms that also have experienced a significant level of interest from “tankless water heater” searchers. You can scan this list to find keywords you might be missing, and you can drill down into each term to find additional suggestions.
Rising searches highlights terms that are growing in popularity at a fast pace (compared to a previous time period). These terms will give you an idea about what might get the highest volume of searches in the future, so you’ll also want to consider adding these terms to your keyword list. In this example, because we looked at the January 2004–present time period, we might not be getting the most up-to-date trending data for “right now,” so let’s see what happens when we look at the data from just the past 12 months.

The most notable difference in this current data is the appearance of the Rinnai keywords in the Top searches list. Likewise, in the Rising searches list, Navien is exhibiting rapid growth over the past 12 months compared with the preceding 12-month period. So, filtering on time really provides better information about which terms are hot right now that you might want to consider for your PPC campaign.
In addition to the “January 2004–present” and “Last 12 months” date-range filters, Insights for Search lets you filter on the past 7, 30 and 90 days and any of the calendar years 2004–2009. You also can set up custom date ranges to fit a particular situation.
Finally, it’s worth noting that the numbers you see on the Insights for Search graphs are not absolute search volume numbers. The numbers, which have been normalized and scaled, reflect how many searches have been done for a particular term, relative to the total number of searches on Google over time.
But Wait, There’s More!Insights for Search also provides the capability to download your data as a CSV file so that you can access the data via a spreadsheet. When you download to a CSV, you get an expanded list of top and rising searches, so it’s well worth doing.
Had enough for one sitting? Next time, we’ll take the examples a few steps further to find out other nuggets of information that Insights for Search has to offer.