The way to strong rankings and high organic traffic requires the search engines to find, understand and index your content correctly. This is called crawling in the SEO language.
The reason why search engines can serve you hundreds of thousands of hits for less than a second before you press “search” is that Google has already traversed the Internet and indexed all pages relevant to the search term you have plotted. That your websites crawles is a prerequisite for that they index, while indexing is a prerequisite for ranking. Google's index can be compared to a giant book that contains all the open content on the big Internet.
Sitemap.xml The first step to take to avoid crawling complications is to apply the side of the sitemap.xmlSo let's say that this is the same thing as that. A sitemap can be seen as an instruction to the search engines to which pages should be crawles, how often they should crawles, and what priority should be given to the search engines in relation to the other pages in the same domain.
Each website on the Internet is allocated a crawl budget of a certain size that determines how much resources (number of pages and amount of time) Google will use to crop pages per day. For larger websites, such site maps are an appropriate way to tell search engines which pages should be the highest priority.
Robots.txt Reason for a limited crawl budget only search engines should be given priority to indexing the pages that are important to show in Google. Examples of pages that are not important to show up in Google are /mine-side and /catalogsearch. Robots.txt is a simple way to signal Google which pages are to be excluded, so that you can achieve the most rapid and up-to-date indexing of the most important pages.
Internal navigation and page structure Page structure and navigation have an important role to play in terms of optimal crash. You can read more about this in the navigation article