Crawling & indexing: How to get your site to Google
Crawling and indexing are the two fundamental processes that search engines like Google use to discover and organize the internet. Without a page being successfully crawled and indexed, it cannot appear in the search results(SERP), no matter how good its content is.
What is the difference between crawling and indexing?
Although the terms are often used together, they describe two separate, consecutive steps. Understanding this process is the basis for any technical on-page optimization.
Step 1: The crawl
When crawling, the search engine bots (also known as “crawlers” or “spiders”) discover new or updated websites. The Googlebot follows links that it finds on already known pages. It virtually jumps from link to link through the entire web to find content and analyze its content (text, images, code).
This is how you control crawling:
- Sitemap: An XML sitemap is like a map for your website. You list all the important URLs in it to help Googlebot find them faster and more reliably.
- robots.txt: This is a simple text file that you can use to instruct the crawler which areas of your website it should not visit (e.g. admin areas or unimportant filter pages).
- Internal linking: A clean internal link structure is crucial so that the crawler can easily discover all relevant subpages of your domain.
Step 2: Indexing
After a page has been crawled and its content analyzed, the search engine tries to understand it and add it to its huge data catalog, the index. If Google determines that the content is of high quality, unique and relevant, the page is indexed and can be displayed for suitable search queries from then on.
Possible problems with indexing:
- Duplicate content: If content is identical or very similar on several URLs, Google may be unsure which version it should index.
- Poor content quality: Thin or unhelpful content is often not even included in the index by Google.
- Technical errors: Incorrect instructions in the code (e.g. a “noindex” tag) can specifically prevent indexing.
How do you check the crawling & indexing status?
The most important tool for this is the Google Search Console. In the “Page Indexing” report, you can see exactly which of your URLs were successfully indexed and which pages had problems. This is the primary point of contact for identifying and rectifying technical errors in this area.
Conclusion: The ticket to Google search
Clean crawling and smooth indexing are the absolute prerequisites for any form of SEO success. You can have the best content in the world – if Google can’t find it and add it to its catalog, it’s invisible. That’s why regularly checking and optimizing these technical processes is one of the most important tasks of any website operator.