What NAP is, and why Google cares
NAP stands for Name, Address, Phone number: the three details that identify your business. Google, and increasingly AI systems, build a picture of you by matching these across your website, your Google Business Profile and every directory you appear in. When they all agree, Google is confident it is looking at one real business and ranks it accordingly. When they disagree, it hesitates, and hesitation quietly costs you the local pack.
How small differences add up
The contradictions are rarely dramatic. They are things like these:
| On your website | In an old directory | Problem |
|---|---|---|
| Beispielstraße 5 | Beispielstr. 5 | Different spelling of the same street |
| 04131 1234567 | 04131 7654321 | An old phone number never updated |
| Café Beispiel | Café Beispiel GmbH | Name written three different ways |
| 21335 Lüneburg | (no postcode) | Incomplete address in one listing |
Each one on its own is harmless. Together, across a dozen listings, they make Google less sure your business is a single, consistent entity, and that is exactly the signal that decides local ranking.
Pick one canonical version
The fix starts with a decision, not a tool. Write down one exact version of your name, address and phone, the way it should appear everywhere:
- Name: exactly as on your signage and legal registration, no added keywords.
- Address: one spelling, one format, with postcode and town.
- Phone: one number, one format.
This is your canonical NAP. Everything else gets brought into line with it.
Where to bring it into line
Update these, in order of impact: your website (including the footer and any LocalBusiness schema), your Google Business Profile, and then the directories that matter for your trade. You do not need to be on every directory, but the ones you are on should all match. A single old listing with the wrong number can undo a lot of good work.
It matters more in the AI era
Consistent NAP has always helped local ranking. Now it also helps AI answers: when ChatGPT or Perplexity decides whether to name you, contradictory details make you harder to trust and easier to skip. Clean, matching data is a small, unglamorous task that pays off in the local pack and in the machines.
Frequently asked questions
Does the exact spelling of my street really matter?
In practice, yes. Google is good at matching, but consistent data removes all doubt. Pick one spelling and use it everywhere rather than relying on Google to guess.
I moved or changed my number. What do I update first?
Your Google Business Profile and your website first, then work through directories. An outdated number in an old listing is one of the most common and most damaging inconsistencies.
Do I need a tool to find all my listings?
For a small business you can usually find them by searching your name and phone number in Google. Citation tools help at scale, but a manual pass covers most local businesses.
Should the name include my main keyword, like 'best bakery'?
No. Use your real business name. Adding keywords to the name breaks Google’s guidelines and creates the very inconsistency you are trying to avoid.