SharePoint Server 2013 - Enterprise Search

Enterprise Search Features Overview

SharePoint Server 2013 Search has been revamped and architected for massive scalability, search driven sites, enterprise wide indexing, and a user-friendly search result experience that demands accuracy.

Below are some enhancements to Search in SharePoint Server 2013:

Result blocks allow a configurable grouping of similar search results
Query suggestions help users find what they previously searched
Site collection administrators can create display templates using an HTML editor to customize the search result appearance
Microsoft Office file type icons make documents easier to find

A new set of ranking models improve people search, intranet search, and internet sites
Analytics is now built directly into the SharePoint Search architecture
Query rules let administrators configure promoted results and result blocks
Continuous crawling makes new items almost instantly available to search results.
Hover preview panel for search results