Servers provide a three-digit HTTP status code
for each resource request they receive. Status codes in the 400s and 500s
indicate that there's an error
with the requested resource. If a search engine encounters a status code error
when it's crawling a web page, it may not index that page properly.
How the Lighthouse HTTP status code audit fails
Lighthouse flags pages
that return an unsuccessful HTTP status code (in the 400s or 500s):
How to fix an unsuccessful HTTP status code
First make sure you actually want search engines to crawl the page. Some pages,
like your 404 page or any other page that shows an error, shouldn't be included
in search results.
To fix an HTTP status code error, refer to the documentation for your server or
hosting provider. The server should return a status code in the 200s for all
valid URLs or a status code in the 300s for a resource that has moved to
another URL.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2019-05-02 UTC."],[],[]]
