Sent when a search is completed.
Sent when a new item is indexed.
Sent when an item is deleted from the index.
Sent when all items are deleted from the index.
Search is a module for searching "core" content along with certain registered modules. You put in a word or two and it gives you back matching, relevent results.
The easiest way to use it is with the {search} wrapper tag (wraps the module in a tag, to simplify the syntax). This will insert the module into your template or page anywhere you wish, and display the search form. The code would look something like: {search}
{search}