Model supports up to 16GB of RAM. However for this processor would recommend sticking with 8GB max. You can opt for 4Gb RAM , you can buy it here.  Crucial RAM 4GB DDR4 2400 MHz CL17 Laptop Memory CT4G4SFS824A   Now if you are looking for a faster computer, before investing in more RAM, starting with a SSD would be greater choice, Machine supports 2.4 Inch SSD. Plus in future if you choose to upgrade your computer you can carry this SSD to new computer. RAM however won't be carried over.   
Hi I want to upgrade my laptop ram from  4gb and my laptop  model is inspiron 5567 Specifications  Ram 4 gb dd4 Processor i3-6006U CPU [NAME].00GHz system type 64 bit
Ram upgrade