New Build

[PaulIIII]

I am having to build my Mom a new computer as her very limited dual core laptop cannot handle windows 10 anymore. I was trying PC parts picker to pick the parts. My question, when ordering online through PC Parts picker https://pcpartpicker.com/   How to make sure that the processor I pick matches up with the memory and motherboard needed and let me have no compatibility issues? Does PC Part Picker do that automatically? I haven't used this method of buying computer parts when in the past, I have just driven down to Microcenter and picked up the parts in person. So, I am asking if PC part picker automatically chooses correct Mobos and processor match up?