I am checking google webmaster tools. I entered the search queries section. There i found alot keywords and their impression and ctr etc. I clicked on one of the query keyword there it shows the keyword and position in search result, but when i go to google.com and type the specified keyword it shows no impressions too...how do i measure find my site's impression on google.com  my site: http://www.trekkingandtoursnepal.comkeyword: trekking nepal  
What does the impression and ctr means in google webmaster
seo;google search console
CTR: Click Through RatioImpressions: The amount of times it is displayedSo lets say you have a webpage. Then Google can show your page in its SERP's (using the snippet they have created). The amount of times it is shown to the Google visitors is called: Impressions.When Google users click your snippet (from the search engine results) they click through to your website, thus: click though ratio, being the percentage of users that are presented with your snippet and that actually click it.