Aaron Axelsen

The Advanced Search Widget is designed to be a replacement to the defaut search widget. The Advanced Search Widget allows you to search for only a 
specific post type and also select which fields to query (title, content, tags).
In addition, it is also possible to place multiple widgets onto the sidebar to search through different custom post types.

Advanced Search Widget

Allows you to add a widget to search custom post types along with other options

Help your users at the same time you improve your SEO.
Make your users find the interesting content in your blog by showing what the peoples is searching in your blog.
Improve at the same time the indexability of your site giving to Search Engines the words the users are demanding in your site and increase your rankings and number of pages indexed.

Search Tag Cloud

Show a Tag Cloud displaying the most popular searches performed by your users in your blog.

Advanced Search Widget vs Search Tag Cloud