Wikipedia:Good article criteria

The good article criteria are the six standards or tests by which a good article nomination may be compared and judged to be a good article. A good article that has met the good article criteria may not have met the criteria for featured articles. The good article criteria measure decent articles; they are not as demanding as the featured article criteria, which determine our best articles.

An article can, but by no means must, be failed without further review (known as quick failing) if, prior to the review:

In all other cases, the nominator deserves a full review against the six criteria from the reviewer and is given a chance to address any issues raised by the reviewer before the article is failed.

A good article is—

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Wikipedia