Empirical historical performance, risk metrics vs benchmark, and constituent schemes rolling return analytics.
Investment in only Debt and money market securities with maturity of upto 91 days. They are generally considered safe but ensure that you are selecting a mutual fund from AMC with risk-o-meter rating being consistently Low.
Safety of Capital over Income generation. These funds historically have been less volatile (less standard deviation). Some AMCs also allow same day redemption of up to INR 50K subject to certain conditions being met.
Liquid funds are taxed as debt funds and gains are taxed only on redemption. Taxation rules keep changing so please consider above content for information purpose only and verify things with your tax person.