There are Three types of Seo :-
White Hat Seo-white hat SEO not have these
keywords stuffing
hidden contents
link farming
Doorway pages
clocking


Black Hat Seo-

Link Manipulation - Buying links, advertorials, and link schemes

Article Spinning

Link Schemes

Link Farms

Link Wheels

Link Networks

Rich Snippet Markup Spam

Automated Queries to Google

Creating pages, subdomains, or domains with duplicate content

Pages with malicious behavior, such as phishing, viruses, trojans, and other malware.



Grey Hat Seo-

Gray hat SEO is SEO techniques that take more risks than white hat SEO techniques but aren't likely to get your site banned from search engines . They're questionable SEO techniques but not in the same category as black hat SEO techniques.

Three types of SEO :
# White Hat Seo
#Black Hat Seo
# Grey Hat Seo

Basically three types of SEO.
1, White Hat SEO
2,Black Hat SEO
3,Gray Hat SEO

Three types of SEO available :

Black Hat SEO
White Hat SEO
Grey Hat SEO .

There are two types of S E O
1. On page
2. Off page

On page SEO is managing the webpage by coding like meta title, content, description and keywords.

Off page SEO is optimizing the website and its unique content in terms of sharing like submission of articles and blog posting .

There have been two types of an SEO:
On-page SEO
Off-page SEO

actually its of three type as above mention by the mates but we consider two such as the black hat and the white hat seo. black hat seo that google not like and white hat seo that google like and provide best serp

White Hat Seo
Black Hat Seo
Grey Hat Seo

there are two types of seo
1.on page seo
2.off page seo

At this time SEO is three type - White hat SEO
Black Hat SEO
Gray Hat SEO

White Hat SEO
Black Hat SEO
Gray Hat SEO

3.types of seo:-

Black Hat seo
Grey Hat seo
White Hat seo

There are three types of SEO-
Black hat seo
white hat seo
grey hat seo

There are 3 types of seo that is
1.white hat seo
2.black hat seo
3.gray hat seo

Types of SEO:
On page SEO
Off page SEO