When to use a Word Cloud
You want the gist of a body of text at a glance
Survey free-text answers, support tickets, review comments, a set of job ads. A word cloud answers 'what is this pile of text mostly about' faster than any other format.
The audience is being introduced to the data, not analysing it
Conference slides, a report opener, a social post, a workshop warm-up. Word clouds are good at getting people interested in a corpus they have not read.
There is one obvious winner and you want it felt, not measured
When a single term is genuinely dominant, sizing it fifty times larger than the rest lands harder than a bar three times longer than the next.
The terms themselves are the point
Sometimes the interesting finding is which words appear at all — the vocabulary, not the counts. A cloud shows a lot of distinct terms in a small space, which a bar chart cannot.