1. A method comprising: receiving text into a first display field; performing a search of a search index to identify a topic relating to the text, the topic being among plural topics being discussed on a social networking service; identifying discussions on the social network service that relate to the topic; retrieving, from the search index, tags for the discussions that relate to the topic; ranking the tags for the discussions that relate to the topic based, at least in part, on popularity of the discussions on the social networking service, a popularity of a discussion is based, at least in part, on an amount of participation in the discussion; suggesting, to a user in an interface, in an order and based on the ranking, ranked tags for the first display field that promote posting to the discussions identified by the tags, with a first tag among the ranked tags relating to a first discussion topic having a first amount of participation, a second tag among the ranked tags relating to a second discussion topic having a second amount of participation, the first tag being ranked higher, relative to a ranking of the second tag, based on the first amount exceeding the second amount, wherein suggesting comprises: selecting the first, higher ranked tag from among the ranked tags in the interface; and automatically incorporating the first, higher ranked tag into the first display field; and enabling, through the interface, the user to accept or reject the first, higher ranked tag that was automatically incorporated into the first display field, wherein, if the user rejects the first, higher ranked tag, the first, higher ranked tag is removed from the first display field.
1. A method comprising: receiving text into a first display field; performing a search of a search index to identify a topic relating to the text, the topic being among plural topics being discussed on a social networking service; identifying discussions on the social network service that relate to the topic; retrieving, from the search index, tags for the discussions that relate to the topic; ranking the tags for the discussions that relate to the topic based, at least in part, on popularity of the discussions on the social networking service, a popularity of a discussion is based, at least in part, on an amount of participation in the discussion; suggesting, to a user in an interface, in an order and based on the ranking, ranked tags for the first display field that promote posting to the discussions identified by the tags, with a first tag among the ranked tags relating to a first discussion topic having a first amount of participation, a second tag among the ranked tags relating to a second discussion topic having a second amount of participation, the first tag being ranked higher, relative to a ranking of the second tag, based on the first amount exceeding the second amount, wherein suggesting comprises: selecting the first, higher ranked tag from among the ranked tags in the interface; and automatically incorporating the first, higher ranked tag into the first display field; and enabling, through the interface, the user to accept or reject the first, higher ranked tag that was automatically incorporated into the first display field, wherein, if the user rejects the first, higher ranked tag, the first, higher ranked tag is removed from the first display field. 5. The method of claim 1 , wherein identifying the topic comprises: using the text to examine the search index for the plural topics; and selecting, from the search index, one or more of the plural topics that corresponds to the text.