NAP Consistency
NAP consistency means that the name, address and phone number of a business are given identically on its website, in its Google Business Profile and in every directory listing; contradictions leave both users and search engines unsure which entry is correct. The abbreviation NAP (name, address, phone) is industry shorthand and does not appear in Google's documentation; what is documented is the underlying requirement that these details be kept current and uniform.
In practice
After every change of address or phone number, it is worth quickly checking the most important directories and listings so that outdated or duplicate details do not stay online for good. A simple table listing every place your details appear makes this check considerably easier.