1. A computer-implemented method, comprising: in connection with and in response to content presented via a network-enabled social media site, determining, by a matching engine of a processor-based server and on the basis of similarities with the content presented via the network-enabled social media site, which one or more of a candidate plurality of creatives that include links to landing sites, to present via the network-enabled social media site; selecting, by a decision engine of the processor-based server, from the candidate plurality of creatives, a set thereof to present via the network-enabled social media site; and presenting, via the network-enabled social media site, one or more of the selected set of the plurality of creatives, wherein the selection of the set of creatives includes consideration of similarities between the content presented via a network-enabled social media site and content on respective landing pages of the landing sites pointed to by the links, wherein the similarities between content presented via a network-enabled social media site and the content on respective landing pages of the landing sites is determined on the basis of one or more of: speech act labels, entities or other special words, or contributor properties of the content presented via a network-enabled social media site.
1. A computer-implemented method, comprising: in connection with and in response to content presented via a network-enabled social media site, determining, by a matching engine of a processor-based server and on the basis of similarities with the content presented via the network-enabled social media site, which one or more of a candidate plurality of creatives that include links to landing sites, to present via the network-enabled social media site; selecting, by a decision engine of the processor-based server, from the candidate plurality of creatives, a set thereof to present via the network-enabled social media site; and presenting, via the network-enabled social media site, one or more of the selected set of the plurality of creatives, wherein the selection of the set of creatives includes consideration of similarities between the content presented via a network-enabled social media site and content on respective landing pages of the landing sites pointed to by the links, wherein the similarities between content presented via a network-enabled social media site and the content on respective landing pages of the landing sites is determined on the basis of one or more of: speech act labels, entities or other special words, or contributor properties of the content presented via a network-enabled social media site. 2. The method of claim 1 , wherein the landing pages comprise any of: curated content, information regarding people, or conversational content.