Results suggestions appear when the keyword does not match any results. The plugin will get the first matching keyword from the selected sources, make a search query and if anything matches it will suggests the keyword and the resutls.
Keyword suggestions appear when no results match the keyword.
Currently four different keyword suggestions sources are supported:
Google keyword suggestions
The search statistics database
Categories, tags and other Taxonomy Terms
You can multiple sources at the same time. Use the drag-and-drop box to select which sources you would like to use. The order matters.
The plugin will go through the selected sources (in order) until a keyword is returned.
Maximal keyword length & count
The maximal keyword length is definable, to avoid lengthy suggestions. Keywords above the defined length (60 by default) will be ignored.
By default the plugins shows 10 keywords, but of course you can change that if you want.
Keyword and Results Suggestion Box Styling
The styling settings can be accessed under the Theme & Styling -> Keyword Suggestions panel, or by clicking on the Go to Keyword Suggestions styling options >> link on the settings.