Web applications is the ability to perform keyword searches or lookups.
And customers on the Web want to be able to look up products by their descriptions, not arbitrary numbers or codes. Some examples are shown in the following graphic. Users need access to customer, product and order data by keywords within the content of the data , because that is how they think about data and what they know or remember about the data. With most databases, users cannot access data by the data in the fields contained within them. For example, customers often call without their customer or order number.