When you have an account, you have the option to receive notification of changes to documents that you frequently use. For example, if you frequently work in Puyallup, Washington, you're going to want to know if any changes have been made to their Design Standards or Standard Details. If you have chosen to put these documents in MySpecs you will receive an email notification that a change has been made to these documents.
USspecbook has recently created the ability for users to add themselves to a directory, the Supplier Directory. Every person who signs up can add their professional information including their company's service area.
More about the (really cool) service area based supplier directory.
For municipalities only. Individuals responsible for advertising or publishing bid notices, RFPs, etc, can sign up for an account and reach all USspecbook members. When a bid notice or RFP is created or uploaded to USpecbook, each member who services that area, receives an email notification alerting them of the opportunity.
This is a great way to reach more relevant viewers. Learn more.