How to Update Robots.txt File in Wordpress by Yoast Plugin

First you install YOAST SEO plugin in your wordpress site, then login your admin panel and go to>>SEO>>TOOLS>>FileEditor.
then click on create robots.txt and edit the file as you want.

How to Remove noodp from Meta Robots of Website

Hi Friends, after the research I have found the solution of how to disable "noodp" in meta tag 

like this:                         <meta name="robots" content="noodp"> 

in yoast plugin on your WordPress website without harming other meta tags of SEO.