ENHANCED DELIVERY OF CONTENT AND PROGRAM INSTRUCTIONS

A tag/content management system delivers customized content and/or program instructions to a user terminal. The system may deliver several groups of program executable instructions, including instructions that are global to all web domains controlled by a client server and those that are specific to a web page/group of web pages. In addition, this system may allow for the creation of testing environments for websites that include modified content and/or program instructions. Various techniques employed by the system may result in a reduction in the errors and latencies that commonly plague conventional implementations.