How to quickly find out if an important page for you has hit the search engine index? And anyway, how many pages of the site do search engines see? 

When the page is indexed, the search robot adds the site information to the database. Further search is performed on the indexed pages. 

Do not confuse indexing and scanning. 

1. Check the indexing in the Google Webmasters toolbar. 

2. Use operators in search queries. 

3. Use plugins and bookmarklets. 

4. Install the services to verify indexing.