If you are still confused regarding the terms commonly used in relation to search queries in Google Webmasters Tools then the video shared below will definitely help you out.
Concept of Crawling and Indexing
Impression and Clickthrough Rate
Search Query Filters
Sorting by CTR
Average Query Position and much more.
This video tutorial is helpful for newbie search engine optimizers and webmasters who wish to learn and understand the concepts related to Google Webmasters Tools.