How to fix this

I have a refrigerator that has low water pressure. Dose anyone know how to fix?

Change the in-line filter. . .

Like Jeff say, change the filter. There can also be a screen right where the line hooks to the fridge. That can clog like a sink screen due to hard water. Depending on where the water line hooks into the supply, if one of the self tapping saddle valves has been used, the tap may not have been fully withdrawn. Good luck.

Thanks guys:D

Could also be a crimped line.

Ice maker manufactures generally advise a complete systems exam and filter change by a reputable dealer every six months to a year depending on usage.
All refrigerator and ice maker water supply lines should be thoroughly flushed, and have new filters installed prior to equipment usage.