The request has succeeded. The meaning depends on the HTTP method used.
HTTP 200 OK is the standard response for successful HTTP requests. For GET requests, the response contains the requested resource. For POST requests, it contains the result of the action. This is the most common HTTP status code.
Essential for SEO. Pages must return 200 to be indexed by search engines. Any other response for content pages will hurt rankings.
LemWatch expects your pages to return 200 OK. If a previously healthy page starts returning other codes, you'll be alerted immediately.