The Search Traffic section of Google Webmaster Tools is a very powerful tool for any one running or administering a website. The search traffic sections has three parts search queries, links to your site and internal links.
A search query is a query that a user enters into a web search engine to satisfy his or her information needs. What’s the difference between a search term and a keyword? A search term is the exact word or set of words a user enters when searching on Google.com. A keyword is the word or set of words created for a given group to target customers.
The search query section of Google Webmaster tools helps you identify search queries and provides important information to help you identify your audience. The information provides how many search impressions, clicks and average position on Google in which these search queries are ranking.
Links to your site is another important section this shows you incoming links and there origin. Inbound links from high ranking sites improve your sites search ranking. Links from black listed sites or spam sites hurt your search engine ranking and should be removed.
Internal links are links to pages on your own site these are very important as those links keep the audience on your page and keep the user engaged adding less of a bounce rate and longer on site time which affect your Google Page Ranking.
The video below show an overview of Search Traffic Tools In Google Webmaster Tools.