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

[harshal]

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

[PrimeItSolution]

Here are some most essential & useful tags in SEO:

Meta Title: 50–60 Char ( with space)

Meta Description: 156 Char ( with space)

Meta Keyword: 5 to 9 words

Alt tag: Image tag

Nofollow tag: use to prevent google bot to follow the link

Noindex: Don’t index the given link

Robot: For blocking page

Canonical tag: prevent duplication