Everyone receive that same email, these are some tips outlines sended by Google Webmaster to their users.
First line indicating that you can check or review you top search engine pages queries such as impression, clicks in search engine results.
Second lines is also similar to the above point.
Third line indicating that Google webmaster also highlight search engine errors which occurred during crawling or indexing errors such as 404 not found error etc. You can see those errors from your webmaster crawling errors section and can resolve those errors which can be a plus point for your site rank in search engine.
So there is nothing like panic in this email
Hope that makes sense.