After you have run a search query, sometimes it will be useful to save the query for later use. For example, you may have created a query to list all the open bugs and new features in a project that are to be completed by a certain date in several projects so you can keep an eye on their progress. Instead of recreating this search query every time you want to check up on the statuses, you can save the query as a filter, which can be reused at a later stage. You can think of filters as named search queries that can be reused.
Other than being able to quickly pull up a report without having to recreate the queries, saving search queries as filters provides you with other benefits, including the following:
Share saved filters with other users
Use the filters as a source of data to generate reports
Use the filters for agile boards (see Chapter 3, Using JIRA for Agile Projects)
Display results on a dashboard as a gadget
Subscribe to the search queries to have results e-mailed to you automatically...