What does it mean if nothing appears while searching for the domain?

If you mean you are doing a search for the site on Google or another search engine and not finding the site it most probably means it has not yet been found and indexed.

It means that the webpages are yet not crawled and indexed by search engine spiders.

Hi Friends,
If you mean you are doing a search for the site on Google or another search engine and not finding the site it most probably means it has not yet been found and indexed. Use Google Console to submit a sitemap and request a manual indexing of the Home Page and the links that follow this page. Providing you have correct navigation and internal links that should get the site indexed and then it will appear in results.