In some cases you will want to create many versions of the same data, simply filtered by one or two values. You might just go ahead and create a dozen views to do this. But often this will result in bad usability as the View dropdown becomes unmanageable, plus you will need to maintain dozens of versions of the same view, should new columns be added or existing ones removed.
There is a simpler way. Create a page that has links to your view with the filter value in the querystring.
You can use up to three Filters this way.