You can apply and save filters for your campaign, ad group, keyword, search term and negative keywords.
Saving filters help you save time when you are searching for a specific metric for the layer you are in.
After you apply the filters of the data you want to monitor, go ahead and save the filter.
This way you do not need to apply filtering every time you repeat your search, you can simply select from the saved ones!
To elaborate: Our client used filters for the storefronts that spend $500 per day her/his for apps and saved this filter by naming ‘’Top Countries’’ to use it whenever she/he wants to track those data.