Issue filters can be used to create filtered views of your issues. Few filters are shown by default for logged in project members. They are -
In addition, there are two filter which anyone will be able to see -
You can create your own personal filters too. To create a custom filter, open any of the personal filters like "Your open issues". Then add or modify the issue fields and criteria you need. Then click the "Save as" button to save the filter with a name you can choose. e.g. "My medium priority issues"