Keyword research for PPC can be incredibly time-consuming, but it is also incredibly important. Your entire PPC campaign is built around keywords, and the most successful AdWords advertisers continuously grow and refine their PPC keyword list. If you only do keyword research once, when you create your first campaign, you are probably missing out on hundreds of thousands of valuable, long-tail, low-cost and highly relevant keywords that could be driving traffic to your site.
An effective PPC keyword list should be:
Relevant – Of course, you don’t want to be paying for Web traffic that has nothing to do with your business. You want to find targeted keywords that will lead to a higher PPC click-through rate, effective cost per click, and increased profits. That means the keywords you bid on should be closely related to the offerings you sell.
Exhaustive – Your keyword research should include not only the most popular and frequently searched terms in your niche, but also to the long tail of search. Long-tail keywords are more specific and less common, but they add up to account for the majority of search-driven traffic. In addition, they are less competitive, and therefore less expensive.
Expansive – PPC is frequentative. You want to constantly refine and expand your campaigns, and create an environment in which your keyword list is constantly growing and adapting.