You will add a filter to the analysis and then save the filter. Filters allow you to limit the amount of data displayed in the analysis and are applied before the analysis is aggregated. Filters affect the analysis and thus the resulting values for measures. Filters can be applied directly to attribute columns and measure columns.
A filter created and stored at the analysis level is called an inline filter because the filter is embedded in the analysis and is not stored as an object in the Presentation Catalog (Catalog). Therefore, an inline filter cannot be reused by other analysis or dashboards. If you save the filter however, it can be reused and is known as a named filter. (Named filters can also be created from the global header.)