1.Breadcrumbs
breadcrumbs can be a great way to help users identify where they are located.
Types of Breadcrumbs.
a. Location-based breadcrumbs
b. Path-based breadcrumbs
c. Attribute-based breadcrumbs
2.Exact Match domain(EDM)
According to EDM, some business man purchase their domains with the name of their keywords, this is not easy, so their site is on top through that keyword.
So google produced a EDM update, according to this update, if your domain name is matched with your keyword, then your site would be blocked by google or google said GOOD BYE to ur site.
3. robots.txt file
Robots.txt file is not a html file, it is just a text file.
The main use of this file is that, to tell search engines what they have to crawled or what not.
In this file, we can hide our folders, files, images and any type of file, which we don’t want that is crawled by spiders.
4.Meta Tags.
Meta tags is mainly use for displaying any web page.
Not considered as Meta Tag, even required anyway