What happens TCS to PF contribution?

Can anyone please help me understand what happens to 8.33% PF contribution by TCS? As we know, TCS contributes 12% of the basic salary to an employee's Provident Fund. Out of the 12%, 8.33% is contributed to the EPS (subject to a wage ceiling) and the remaining 3.67% goes to the EPF. However, i just want to understand: What actually happens to this 8.33% ? What is the purpose of it being sent to EPS? Will an employee get this 8.33%? If yes, when and how? How will an employee know about the exact amount that got accumulated as part EPS over the period of time? Does TCS have any pension policy which this EPS Contribution alludes to?

Please excuse my lack of understanding on this subject.

Thanks!