20. A machine-readable medium comprising instructions stored therein, which when executed by a machine, cause the machine to perform operations comprising: detecting a user request to tag an item, while the item is being displayed to the user; identifying a content identifier corresponding to the item; selecting a set of user-generated labels from a plurality of user-generated labels corresponding to the content identifier comprising selecting at least one of the set of user-generated labels from the plurality of user-generated labels based on a fitness value of the at least one user-generated label, wherein the set of user-generated labels comprises two or more user-generated labels of the plurality of user-generated labels, each of the plurality of user-generated labels representing a sentiment regarding the item, the selecting operation further comprising analyzing the sentiment represented by one or more of the user-generated labels of the set of user-generated labels based on the relation of the sentiment represented by the user-generated label to a pre-defined set of basic emotions; wherein the set of user-generated labels are selected to provide a full spectrum of sentiments regarding the item, such that at least two of the user-generated labels of the selected user-generated labels provide opposite sentiments from one another; identifying display information regarding the set of user-generated labels, the display information including one or more of size, color or location information for visually representing the set of user-generated labels; and providing the set of user-generated labels to be displayed to the user on a display area, wherein the set of user-generated labels is provided for display to the user according to the display information and wherein the display information for at least one user-generated label of the set of user-generated labels is different from at least another user-generated label of the set of user-generated labels.
20. A machine-readable medium comprising instructions stored therein, which when executed by a machine, cause the machine to perform operations comprising: detecting a user request to tag an item, while the item is being displayed to the user; identifying a content identifier corresponding to the item; selecting a set of user-generated labels from a plurality of user-generated labels corresponding to the content identifier comprising selecting at least one of the set of user-generated labels from the plurality of user-generated labels based on a fitness value of the at least one user-generated label, wherein the set of user-generated labels comprises two or more user-generated labels of the plurality of user-generated labels, each of the plurality of user-generated labels representing a sentiment regarding the item, the selecting operation further comprising analyzing the sentiment represented by one or more of the user-generated labels of the set of user-generated labels based on the relation of the sentiment represented by the user-generated label to a pre-defined set of basic emotions; wherein the set of user-generated labels are selected to provide a full spectrum of sentiments regarding the item, such that at least two of the user-generated labels of the selected user-generated labels provide opposite sentiments from one another; identifying display information regarding the set of user-generated labels, the display information including one or more of size, color or location information for visually representing the set of user-generated labels; and providing the set of user-generated labels to be displayed to the user on a display area, wherein the set of user-generated labels is provided for display to the user according to the display information and wherein the display information for at least one user-generated label of the set of user-generated labels is different from at least another user-generated label of the set of user-generated labels. 21. The machine-readable medium of claim 20 , wherein the pre-defined set of basic emotions comprise the set of basic emotions as defined by Plutchik's psychoevolutionary theory of basic emotions.