AFE7950: Reg- Device clock and Sysref clk length matching.

Tool/software:

Dear team,

I am using LMK04832 for sourcing clock to AFE7950.I am having only one ADC chip in my module.

Clock and SYSREF is generated from LMK04832 .Length matching for Clock path and  SYSREF path is done in our PCB .

What is the purpose  for length matching the clock and SYSREF lines ,If length match between the clock and sysref is not done what will happen?