For the love of seo tools
The reasoning for this is simple. Say a customer is looking for a certain service or business that has to do with house painting. If they are not familiar with businesses in their area that performs this service, they may search for it on the internet. A potential customer would probably type the phrase house painting into an engine, and then click on the first resulting site they see. The websites near the top usually receive the majority of the business as a result of their placement.