Is it necessary to use Robots.txt file?

[SearchEngineLabs]

It is not necessary to have Robo.txt file but it is advisable to have Robo.txt file because it will help the google bots to crawl easily and it is an added advantage for SEO to rank high.

[jonathan brown]

Hi,

No, it's not necessary to add Robot.txt file but it can’t be ignored because it helps to navigate search engine robots like Google robots to crawl and index websites’ pages.

Benefits of Robot.txt file are as follows:
Index only those areas of the website you want to index.
Helps in indexing particular files on a site (images, content, videos, PDFs)
Avoids duplicate site content pages from showcasing in SERPs

[lokesh91]

Yes It is necessary, A robots.txt file gives instructions to web robots about the pages the website owner doesn’t wish to be crawled. This file is placed in root folder of website.

[Shoppingswag]

The robots.txt protocol is a useful tool to prevent certain bots from spidering certain pages/sections of sites while allowing others through. It's also a lot easier to modify a robots.txt file than it is to update dozens, hundreds or even thousands of Web pages to make a single change. Also, unlike the META tag, the robots.txt file can block SPECIFIC search engine spiders from crawling and indexing your site.

[madaboutdm1719]

It is very important to use robots.txt if you are using WordPress to design your website. Simply because there might be many unwanted links, folders which you dont want google to index