Load filters allow you to filter what is loaded into a data view based on selected criteria.
For example, if you had a data store field that contained sales information about all 50 United States but you only wanted to visualize data for Illinois, you could create a Load filter that instructs the data view to only pull sales data for Illinois.
If you don't create any Load filters, all data view fields will populate with all available data.
When are Load Filters Applied?
Load Filters are applied each time a Data View executes.