How many types of Meta Tags are there in SEO and what are their characters limit

[AliceFowell89]

How many types of Meta Tags are there in SEO and what are their characters limits?

[Roy Milson]

There are three types Meta tags in SEO.

1. Meta Title tag with 60 characters limits
2. Description Meta tag with 160 characters limits
3. Keyword Meta tag with 200 characters limits

[alex.thomson]

There are 14 Meta tags are:
1. Description Meta Tag
2. Generator Meta Tag
3. Keywords Meta Tag
4. Revisit-After Meta Tag
5. Robots Meta Tag
6. Content-Type Meta Tag
7. No-Cache Meta Tag
8. Audience Meta Tag
9. Author Meta Tag
10. Content-Language Meta Tag
11. Page-Topic Meta Tag
12. Page-Type Meta Tag
13. Prog Id Meta Tag
14. Publisher Meta Tag

[RH-Calvin]

A meta tag is a tag (that is, a coding statement) in the Hypertext Markup Language (HTML) that describes some aspect of the contents of a Web page. There are many meta tags and html-tags and obviously they don't all influence the search result.

[manishaverma]

There are 14 Meta tags are:
1. Description Meta Tag
2. Generator Meta Tag
3. Keywords Meta Tag
4. Revisit-After Meta Tag
5. Robots Meta Tag
6. Content-Type Meta Tag
7. No-Cache Meta Tag
8. Audience Meta Tag
9. Author Meta Tag
10. Content-Language Meta Tag
11. Page-Topic Meta Tag
12. Page-Type Meta Tag
13. Prog Id Meta Tag
14. Publisher Meta Tag
1. Meta Title - According to google new guidelines it must have 60 characters.
2. Meta Description -  its limit are 160 characters.
3. Meta Keyword :-     according to google new guidelines it not compulsory to include them. but many people are using now.

[SankalpPatil]

2 types meta tags in SEO. 1.Description ... meta keyword tags & character limit should be upto 125-131 char. ... There are many types of meta tags in a website, such as title, description, keywords, author name, language etc.

[ravidubey]

1. The Title Tag
Although the title tag appears in the head block of the page, it is not actually a meta tag. What’s the variation? The title tag is a required page “element” according to the W3C. Meta tags are optionally available page descriptors.

2. The Description Meta Tag
Ideally, your description should be no extended than 155 characters (including spaces). However, check the search engine results page (SERP) of choice to ensure this. Some are longer and some are shorter. This is only a rule of thumb, not a definite “best practice” anymore.

3. The Keywords Meta Tag
A long time ago in a galaxy far, far away, the “keywords” meta tag was a important element for early search engines. Much like the dinosaurs, this tag is a fossil from ancient search engine times.
The only search engine that looks at the keywords nowadays is Microsoft’s Bing and they use it to help detect spam. To avoid hurting your site, your best option is to never add this tag.