Limits or filters can be used to help you to focus your search. Common limits are criteria such as date range, language, or type of material.
Sometimes you can see limit options when you carry out your search, especially if using an Advanced search. More often, limits are available after you have carried out your search and can be applied to your results.
The type of limits available and how to use them varies - make sure you check the help pages for the resource you're using.
Apply limits one at a time, so you can see the effect they are having on your results. Using too many limits might narrow your results too much.