Search:

Off page activity are

Article submission
Blog submission
Directory submission
Images sharing
Video sharing
Info-graphics submission
Guest posting
Classified submission

Best SEO tools are

Google Analytic
Google Webmaster
Google Adwords
Alexa toolbar
SEO Mastering

SEO On page Activity are

Title
Meta Description
Meta Keywords
URL Structure
Sitemap.xml
Robots.txt
301 Redirection
404 Error page

Google,bing are the most common search engine.

Cloaking is Black hat SEO Techniques. Cloaking is a search engine optimization technique in which the content or information presented to the user is different from that presented to search engine...

Backlinks are Two Type

Dofollow Backlinks
Nofollow Backlinks

Always create do follow Links.

Gray hat SEO Mixer Of Black hat SEO and White hat seo.

Grey hat consists of techniques such as:

Cloaking
Purchasing old domains
Duplicate content
Link buying
Social media automation and...