The search queries report has just been changed in Google Webmaster tools Google named it Search Analytics (Beta). I saw it today morning IST time, it seems very useful because the bifurcation of data to be analysed there is also option to go back to standard search query report.
Google on its 15th birthday announced the Hummingbird algorithm here are some key points to quickly understand it.
The world biggest search engine now more focus on understanding relationships among things phrase match meanings as you type or give instruction by voice as previously to its original strategy of matching keywords.
Hyper Text Transfer Protocol or HTTP response status codes are returned when search engines or website visitors make a request to a web server. These codes with three digit value indicate the response and status of HTTP requests. The http response starts form 1xx, 2xx, 3xx, 4xx and 5xx for 1xx I suggest you to do some search hear I am explaining you the rest of the http status codes.