Robots.txt:- It is incredible when web crawlers habitually visit your webpage and record your substance yet frequently there are situations when indexing parts of your online substance are not what you need. Case in point, in the event that you have two forms of a page (one for the survey in the program and one for printing), you'd rather have the printing rendition prohibited from creeping, else you hazard being forced a copy content punishment. Likewise, on the off chance that you happen to have delicate information on your site that you don't need the world to see, you will likewise favor that web indexes don't file these pages (despite the fact that for this situation the main beyond any doubt route for not indexing touchy information is to keep it logged off on a different machine).