This standard defines direct fine-grained access to geographic information at the feature and feature property level by specifying discovery, query, locking and transaction operations and operations to manage stored, parameterized query expressions. This standard covers 11 operations e.g. GetCapabilities (discovery operation). This Standard continues to be a reliable means to provide geospatial data to the web. However, the functional capabilities are now available in a more modern web API, OGC API â Features, and implementers are encouraged to use the newer Standard.
Reference
https://www.ogc.org/standards/wfs/