What Does "Configurable TDP-up/down" Mean in Intel Product Specifications (ARK)?

Need to know what Configurable TDP-up/down means

• All Intel® processors come with a specific Base Frequency and a specific TDP. 
• Configurable TDP options mean the computer manufacturer can modify the Base Frequency and TDP of the CPU within the specific values posted on the product specification page.
• Depending on the design of the chassis/cooler, the computer manufacturer may increase or decrease Base Frequency and TDP.