Transactional searches

Great post on Jeremy Liew's blog about the nature of searches (http://lsvp.wordpress.com/2007/08/08/monetizing-search/)

There are 3 types of searches:

1. Informational (50%)
2. Transactional (30%)
3. Navigational (20%)

All of the monetization comes from transactional searches. Vertical search engines (shopping, health, local, travel, and video) see a higher proportion of transactional searches than general search.