What common crawling issues can be caused by incorrect robots.txt configuration?

When robots.txt is misconfigured, it usually causes issues such as search engine crawling受阻, resource waste, or indexing abnormalities, directly affecting the visibility of website content. Common crawling problems include: - Incorrect Disallow rules: Important pages (such as the homepage, product pages) are mistakenly included in Disallow, preventing crawlers from accessing them and resulting in the pages not being indexed. - Path format errors: Such as missing slashes (/) in paths or case mismatches (e.g., "/Page" and "/page"), leading to invalid rules or incorrect blocking of normal pages. - Improper User-agent settings: Failing to correctly specify target crawlers (e.g., using only "User-agent: *" but wanting to restrict Googlebot separately), causing rules to not take effect accurately. - Sitemap declaration errors: Incorrect Sitemap URLs or outdated ones, preventing crawlers from discovering the sitemap through robots.txt and affecting crawling efficiency. It is recommended to regularly use Google Search Console's robots.txt testing tool to verify the configuration, ensuring clear rule logic and accurate paths, and avoiding issues with website crawling and indexing due to configuration details.