Type-in traffic means when a user type or entering a keyword or phrase in web browser with no spaces or a dashed in place of a space, this is important when you start to think a business and you need to buy a domain name for it, for example if you have a business in car insurance list you may want to have and active website with carinsurancelist word instead car-insurance-list although many people believe that domain with hyphen will easily picked by search engine but whether hyphenated domain names still provide any significant advantage in the search engine’s is unclear.
In general, try and avoid hyphens in your domain as you tend to loose type-in traffic you may get on your site and most online users dont prefer remembering names with hyphens

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