A web crawler tool emulates search engine bots. Web crawlers are indispensable for search engine optimization. But leading crawlers are so comprehensive that their findings — lists of URLs and the various statuses and metrics of each — can be overwhelming.
For example, a crawler can show (for each page):
- Number of internal links,
- Number of outbound links,
- HTTP status code,
- A noindex meta tag or robots.txt directive,
- Amount of non-linked text,
- Number of organic search clicks…
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