There is a drop down menu next to the Trends header where you can select the different types of clouds
Trending topic clouds show headline phrases (instead of just individual words or hashtags: see below). Although phrases may contain more than two words, they are computed from bigram frequencies only (pairs of words). This means that the frequency shown when hovering over a phrase in the cloud may differ slightly from the phrase's actual frequency.
In more technical terms, phrases are computed from a directed, weighted graph that connects words with weighted edges. The weight of an edge between two words corresponds to the frequency with which the particular combination of words or bigram actually occurs in the active set of mentions. Headline phrases ("trending topics") correspond to paths in the graph that are more strongly connected than other paths in the graph going through the phrase's words. Ideally, all edges in such a path have more or less the same weight, corresponding to the actual frequency with which the corresponding phrase occurs. This is not always the case however, which explains why tooltip frequencies may sometimes differ slightly from the phrase's actual frequency.
Word clouds only contain individual words, and more frequent words are shown in a larger font. Stop words (such as "the" and "a" in English) are not shown, because they are not informative.
The frequency shown in the tooltip when hovering over a hashtag or word in a cloud corresponds to the number of mentions containing the word (given the active topic selection and filter settings).
Hashtag clouds only contain hashtags, again with more frequent hashtags shown in a bigger font size.
The frequency shown in the tooltip when hovering over a hashtag or word in a cloud corresponds to the number of mentions containing the hashtag (given the active topic selection and filter settings).
When you activate Category Tags in your account, your Trends dropdown will also include the names of the active Category Models in your account. When selecting one of them, we render a word cloud based on those tags.
The tags which were applied to most to your data will appear in a bigger font size. The tooltip you see when hovering over a tag shows the amount of mentions this category tag was applied to (taking your active topics and filter setting into account).
Filter on specific keywords and choose for hashtags to find out which are being used the most when people talk about the chosen terms.
Filter on sentiment value to see the top reasons behind the chosen sentiment visually.