Welcome to WebmasterWorld Guest from 220.127.116.11
Forum Moderators: goodroi
Robots.txt and sitemaps are tools. They may or may not be useful depending on what you need and how you use them.
Robots.txt can help you better control what files the search engines crawl on your website.
Sitemaps can help you expose your content to search engine crawlers. It does not guarantee the search engines will index the content but a sitemap can help the search engines discover your content.