All slider bar filters have a numerical value associated with it. For example, ad-strength, ad-gravity, alexa-rank and days running all are numerical. Typically, you want to define a range for such filters to get specific results. The sliders allow you to define the range by selecting the minimum and maximum values. The slider handle on the leftmost side controls the minimum value and slider value on the rightmost side controls the maximum value.
You can learn more about its specific use by reading our guides on finding winning affiliate campaigns and several other help articles in our advanced help article series.