I have 30K in my saving bank account right now. Should I put this money in a liquid fund or let it stay in savings account? Which is a more beneficial option?

It depends whether these are emergency funds or excess savings. I put some emergency funds in very liquid savings account and the rest investing in high yield cash management account

It depends on the purpose of these funds.

If they are spare cash, excess of emergency funds and for daily use, you can use them for investments (depending on your risk profile). You can read up more on the various instruments for investing on Seedly.

If they are cash for everyday use, you can consider evaluating your spending habits and upcoming expenditure to see if you need more/less. If there is a surplus, then similarly, you can invest them.

If the cash is emergency funds, then you shouldn't invest them at all. It is good to keep them in a savings account where it can be withdrawn quickly (at almost equal value) when needed.