Abstract: The various embodiments described in the present disclosure, in at least one aspect, relate to computer-implemented methods of online advertisement. In one embodiment, a method includes, in response to receiving a request for an ad to be provided to a user in an online session, identifying a plurality of ads as candidates for consideration, determining one or more sentiments of a content of the online session, and ranking the plurality of identified ads based at least in part on (i) a correlation between the content of the online session and a content of each identified ad, and (ii) a correlation between the one or more sentiments of the content of the online session and the content of each identified ad.

Abstract: The various embodiments described in the present disclosure, in at least one aspect, relate to computer-implemented methods of online advertisement. In one embodiment, a method includes determining an attention score for each of a plurality of ad creatives corresponding to a common ad content based on at least a correlation between each ad creative and a user's subconscious interest. The method further includes selecting an ad creative among the plurality of ad creatives based at least in part on the attention scores, and presenting the ad content with the selected ad creative as an ad impression to the user.