there are many menus in menu bar of photoshop. but i don't know more about any menu. what is the work of filter menu?
Filters have ready made effects by which you can give stunning looks to your image. You do not need to be an artist for this. They are really simple to use.
Best way to learn is to use them and see the effects they give you. Just open up a picture into Photoshop and try out different filters on it to see what they do!
there are some very interesting features known as filters which are very helpful in photographic techniques and in typography as well there is a complete tutorial of lynda.com is you are really curious to know about filters in photoshop check this link :http://www.lynda.com/Photoshop-tutorials/filters/250-2.html
Like others have said, use the filter gallery to preview filters. They're amazing. It's not just for effects, either; I like using stylize -> diffuse -> anisotrophic to smooth out lineart.
I love the filters, my favorites are add noise and pixelize, and a cool web 2.0 look.look up a few tutorials, they're very much worth it!
Filter is most significant element of photoshop. we can change the shades and can use the different kind of special effects for finishing which makes the images too much attractive and prominent.
filter effect most impotent and use full tab in photoshop. its have lot of effects example. if you want any style in photoshop , sure to visualize.....