Cloaking is a technique used to deliver the content on a Web page to a search engine in a way that is different to what the user was looking for. The purpose of cloaking is to boost a website’s search engine rank on certain keywords. Cloaking takes a user to the other sites than what he or she expects by disguising those sites’ true content. Website Expert Guru
In New update we can add meta description up to 300 characters before update it was 155 characters) with spaces. its confirmed update and currently new deception with 300 characters visible on search window.its really nice update to describe your web page. for more you can learn. Moz , search engine land