Network for matching an audience with deliverable content

1. A computer implemented method for delivering content to a client computer over a computer network, the method comprising:

managing audience segments using segment-targeting cookies stored on the client computer which each include a segment identifier that indicates an audience segment of which the client computer is a member, and wherein said audience segments correspond to a computer network of audience member information collection domains including a first domain and a second domain that is separate from the first domain;

receiving an indication that a client computer has a first attribute based upon information collected in association with activity by the client computer in the first domain;

receiving an indication that the client computer has a second attribute based upon information collected in association with activity by the client computer in the second domain;

storing the indications of the first and second attributes in a database as profile data;

determining from the stored profile data that the client computer is a member of a network segment that is defined to include client computers having the first attribute and the second attribute;

transmitting the content over the computer network to the client computer based on the client computer being a member of the network segment; and

displaying the content on a display associated with the client computer.

2. The method of claim 1 , further comprising:

maintaining a plurality of network segments including the network segment;

receiving bids to direct a particular content to client computers in a given network segment from the plurality of network segments; and

transmitting the particular content to client computers in the given network segment over the computer network based upon the received bids.

3. The method of claim 2 , wherein the particular content is an advertisement.

4. The method of claim 1 , further comprising:

dynamically confirming whether the client computer is available for the delivery of content based upon membership in network segments; and

transmitting the content to the client computer where it is determined that the client computer is confirmed to be available for the delivery of content.

5. The method of claim 4 , wherein availability is confirmed by examining a cookie value.

6. A computer implemented method for delivering advertising content to a client computer over a computer network, the method comprising:

establishing a connection between the client computer and a server hosting a first local domain;

receiving an indication that the client computer has a first attribute based upon information collected as a result of activity by the client computer in the first local domain;

associating the client computer with a first audience segment based at least in part on the first attribute;

transmitting first advertising content over the computer network to the client computer based on the client computer being a member of the first audience segment as indicated by an audience segment-targeting cookie including an audience segment identifier stored on the client computer;

displaying the first advertising content on a display associated with the client computer;

establishing a connection between the client computer and a server hosting a second local domain;

receiving an indication that the client computer has a second attribute based upon information collected as a result of activity by the client computer in the second local domain;

associating the client computer with a second audience segment based at least in part on the second attribute;

establishing a connection between the client computer and a server hosting a network domain hierarchically related to the first and second local domains;

determining that the client computer is associated with activity in both the first and second local domains;

storing the indications of the first and second attributes in a database as profile data;

determining from the stored profile data that the client computer is a member of a network segment that is defined to include client computers having the first attribute and the second attribute as indicated by a network segment-targeting cookie including a network segment identifier stored on the client computer;

examining the network segment identifier stored on the client computer to dynamically confirm the client computer is available for the receipt of second advertising content based upon membership in the network segment;

transmitting the second advertising content over the computer network to the client computer based on the client computer being a member of the network segment and being available for receipt of the second advertising content; and

displaying the second advertising content on the display associated with the client computer.

7. A computer implemented method for delivering an advertisement to a client computer over a computer network, the method comprising:

managing audience segments using segment-targeting cookies stored on the client computer which each include a segment identifier that indicates an audience segment of which the client computer is a member, and wherein said audience segments correspond to a computer network of information collection domains including a first domain and a second domain that is separate from the first domain;

receiving an indication that a client computer has a first attribute based upon information collected in association with activity by the client computer in the first domain;

receiving an indication that the client computer has a second attribute based upon information collected in association with activity by the client computer in the second domain;

storing the indications of the first and second attributes in a database as profile data;

determining from the stored profile data that the client computer is a member of a network segment that is defined to include client computers having the first attribute and the second attribute as indicated by a network segment-targeting cookie including a network segment identifier stored on the client computer;

transmitting the advertisement over the computer network to the client computer based on the client computer being a member of the network segment; and

displaying the advertisement on a display associated with the client computer.

8. The method of claim 7 , further comprising:

maintaining a plurality of network segments including the network segment;

receiving bids to direct the advertisement to client computers in a given network segment from the plurality of network segments; and

transmitting the advertisement to client computers in the given network segment over the computer network based upon the received bids.

9. The method of claim 7 , further comprising:

dynamically confirming whether the client computer is available for the delivery of content based upon membership in network segments; and

transmitting the advertisement to the client computer where it is determined that the client computer is confirmed to be available for the delivery of content.

10. The method of claim 9 , wherein availability is confirmed by examining an audience segment-targeting cookie value.

11. The method of claim 9 , wherein availability is confirmed by examining a network segment-targeting cookie value.

12. A method for delivering content to a client computer over a computer network, the method comprising:

managing audience segments corresponding to a network of information collection domains including a first domain and a second domain that is separate from the first domain;

receiving an indication that a client computer has a first attribute based upon information collected in association with activity by the client computer in the first domain;

receiving an indication that the client computer has a second attribute based upon information collected in association with activity by the client computer in the second domain;

storing the indications of the first and second attributes in a database as profile data;

determining from the stored profile data that the client computer is a member of a network segment that is defined to include client computers having the first attribute and the second attribute as indicated by a network segment-targeting cookie including a network segment identifier stored on the client computer; and

displaying content on a display associated with the client computer based upon membership of the client computer in the network segment.

13. The method of claim 12 , further comprising:

maintaining a plurality of network segments including the network segment;

receiving bids to direct a particular content to client computers in a given network segment from the plurality of network segments; and

accommodating the direction of the particular content to client computers in the given network segment based upon the received bids.

14. The method of claim 12 , wherein the particular content is an advertisement.

15. The method of claim 13 , wherein accommodating the direction of the particular content to client computers comprises causing the advertisement to be served to client computers in the given network segment.

16. The method claim 12 , further comprising:

dynamically confirming whether the client computer is available for the delivery of content based upon membership in network segments; and

accommodating the delivery of content to the client computer where it is determined that the client computer is confirmed to be available for the delivery of content.

17. The method of claim 16 , wherein availability is confirmed by examining a cookie value of the network segment-targeting cookie.

18. The method of claim 12 , wherein the audience segments are managed using audience segment-targeting cookies.

19. The method of claim 18 , wherein the segment-targeting cookies each include an audience segment identifier that indicates an audience segment to which the client computer belongs.