Liquidity allows increasing the demand in DeFi projects. Investors and traders prefer to use DeFi pools with the best liquidity to have better conditions and maximum profit.
Liquidity pools with high liquidity attract a lot of people to the pools.
Now DeFi products are actively developing and appear a lot of tools that make the use of DeFi more comfortable and useful for people.
The more people use DeFi the more popular DeFi is.