Cloaking is the technique in which content or information shown to user is different from that shown to crawlers for better indexing. Cloaking is implemented to improve ranking by misleading crawlers. But this never a right approach, crawler will immediately remove or blacklist the site. such practice breaks the principles of search engine which result into ban of the site.

Cloaking is seo technique used to hide information from Google crawlers. As it shows different content to user and have different content for search engines, so that they are unable to crawl it. It is a black hat seo technique to increase ranking which can result to blocking you website if crawlers are known of it.

Cloaking is a Black Hat SEO technique used to deliver the content on a Web page to a search engine in a way that is different from 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.

Cloaking is a search engine black hat technique in which the query shown to users and search engines is different
There are different ways to do the cloaking

Invisible hidden text
Flash-based websites
cloaking in emails

Cloaking is one of the search engine optimization technique in which the content or information appears is different to users and for crawlers.