National directories
Large platforms can be important because they are widely used, integrated into other services, or visible in search results. They also tend to have established verification and data standards.
The exact priority set varies by country.
Local and regional directories
City chambers, regional business organizations, tourism sites, neighborhood guides, and local publications can connect the business to a real geographic community.
These sources often require more manual research because they are not part of generic directory lists.
Industry directories
Industry-specific sources add categorical relevance and can be particularly valuable for professional services, healthcare, hospitality, home services, and regulated industries.
Eligibility and profile quality matter more than the raw number of sites.
Build the mix
Cover the important broad platforms first, then add the strongest local and niche sources. Use competitor and customer research to refine the list over time.