Rain gutter guards and screens help to lower the amount of maintenance and gutter cleaning. There are several different types of rain gutter guards, I personally recommend plastic guards.
The rain gutter guards have round holes on the surface and a fine screen / micro mesh on top of it. This prevents debris falling off the trees from contaminating the gutter. Anything that accumulates on top of the screen will be eventually washed off by the rain or blown off the surface with the wind, thus reducing your gutter cleaning tasks to minimum.
There is another version of this guard without the screen, it is slightly cheaper but allows smaller leaves and debris to penetrate and eventually clog the gutter.
Another thing to consider is the rain gutter guard color,this particular type comes in white and brown.
Why is the rain gutter screen / guard color important ,if your roof receives a lot of sun, brown gutter guards made out of plastic will absorb lots of heat and start bending and changing its dimensions over time.
So, a white gutter guard (plastic) will perform better, and if you could get a similar product in long sections to avoid seams, your gutters will be almost maintenance free.

Rain gutter guards and screens help to lower the amount of maintenance and gutter cleaning. There are several different types of rain gutter guards, I personally recommend plastic guards.
The rain gutter guards have round holes on the surface and a fine screen / micro mesh on top of it. This prevents debris falling off the trees from contaminating the gutter. Anything that accumulates on top of the screen will be eventually washed off by the rain or blown off the surface with the wind, thus reducing your gutter cleaning tasks to minimum.
There is another version of this guard without the screen, it is slightly cheaper but allows smaller leaves and debris to penetrate and eventually clog the gutter.
Another thing to consider is the rain gutter guard color, this particular type comes in white and brown.
Why is the rain gutter screen or guard color important,if your roof receives a lot of sun, brown gutter guards made out of plastic will absorb lots of heat and start bending and changing its dimensions over time. 
So, a white gutter guard (plastic) will perform better, and if you could get a similar product in long sections to avoid seams, your gutters will be almost maintenance free.