Visitors to your web site that are interested in your particular product or service.
Visitors who already have an interest in the information and/or products available from your website. For example, pet owners visiting an online pet store are targeted traffic, while people searching for sports memorabilia are not.
Visitors entering your site interested in your product, service, or information. Search engines and directories as well as text ads and paid advertisements often funnel these visitors to your site. Target traffic is the type of traffic you want on your site, relevant ads and titles in search engines can help increase the amount of target traffic, while decreasing the amount of untargeted traffic.
as opposed to 'random traffic' or 'junk traffic', means clean, quality traffic, consisting of visitors who come from a page or through a link that gives them a rough idea of where they are heading, and they clicked on the link because they were interested. [example: On a site that sells a book about fishing, the visitors coming from a web portal on this topic, through a link that tells them exactly that it's about a site selling a book, sometimes saying a word or two about it
The concept of directing traffic to a website based on the requirements of that traffic (i.e. matching user "needs and wants" with site provisions.