The search result page is a core piece of the search user interface since it owns:
Building the query
Issuing the query against the SharePoint index
Receive results and organizing the results
Rendering results and interaction with the user
The result page contains several web parts that all interact and they each own part of the search experience:
The main web part of the result page.
The core results web part will show the ranked results order by relevance by default.
High Confidence Results
This web part will show best bet results, special terms, people and keyword definitions for the query.
Exactly what is visible can be configured in the shared web part properties.
High confidence results will always rely on exact keyword matches
Search Best bets
This web part will show best bet results
Paging web part will control paging of the result
This web part provides a summary of the query. It is outputting the keyword/scope that’s being queried.
This web part will show the statistics of the query.
Basically number of results, total number of results and the elapsed query time.
All of the web parts use the same hidden object instance to
initiate the query and configure properties
get the results in xml when they are ready
All the web parts specify a result search ID that they are associated with – default is query1.