What's the difference between a search with and without a wildcard (*)?

If you use the keyword "best bike for * ", then the tool will only return keyword ideas that have a specific structure, such as "best bike for something".

On the other hand, if you use the keyword "best bike for", then the tool will return a wider range of keyword ideas, including phrases like "best 3 wheel bicycle for adults", "best beach cruiser for women", etc...