depends what youre taking pics of as to what settings youll need.
i dont know what settings yours has got but these are common ones.
digital zoom, not worth using as you can zoom in on the pc if you want digital zoom.
macro, is for close ups.
EV shift, this lets you adjust the brightness sensitivity,like if youre taking a pic of a lightbulb that is on you can turn it down and you can see the bulb and not just the white glare from it.
white balance, adjusts its so white looks white when under different lighting, veg or flower lights for example.
quality, higher the better.
size, same as cam mp or less, more than gives lower quality.
a simple magnifying glass will do wonders for a cheap cam though