SEO and growth glossary

0–9 Terms and Definitions

20 plain-English definitions begin with 0–9. Showing page 1 of 1.

All 0–9 definitions

10x content: Content engineered to be ten times more useful than the highest-ranking competing result, popularized by Rand Fishkin.
200 OK: The HTTP status code indicating that a request succeeded and the requested resource was returned normally.
3-pack: The block of three local business listings shown alongside a map in local search results, also called the local pack.
301 Moved Permanently: An HTTP status code signaling that a URL has been permanently moved, with most ranking signals passed to the destination.
301 redirect: A permanent redirect from one URL to another, used to consolidate ranking signals onto the destination URL.
302 Found: An HTTP status code indicating a temporary redirect where the original URL is expected to be restored.
302 redirect: A temporary redirect generally not intended to pass full ranking signals to the destination.
304 Not Modified: An HTTP status code indicating that a cached version of a resource is still valid and need not be redownloaded.
307 redirect: An HTTP/1.1 temporary redirect that preserves the original request method and body.
308 redirect: An HTTP permanent redirect that preserves the original request method, equivalent in intent to a 301.
401 Unauthorized: An HTTP status code indicating that valid authentication credentials are required and are missing or invalid.
403 Forbidden: An HTTP status code indicating that the server understood the request but refuses to authorize it.
404 error: A response indicating that the requested URL does not exist on the server.
404 Not Found: The HTTP status code returned when a URL is not found at the requested location on the server.
410 gone: An HTTP status code indicating that a resource has been intentionally and permanently removed.
429 Too Many Requests: An HTTP status code indicating that a user or crawler has sent too many requests in a given period.
500 Internal Server Error: An HTTP status code indicating an unexpected server condition that prevented the request from being fulfilled.
502 Bad Gateway: An HTTP status code returned when a gateway or proxy receives an invalid response from an upstream server.
503 Service Unavailable: An HTTP status code indicating the server is temporarily unable to handle the request, often due to maintenance or overload.
504 Gateway Timeout: An HTTP status code indicating that an upstream server failed to respond within the allotted time.