"Funds" means "money". We use the word "funds" when talking about money in a technical sort of way. Here are some examples:

The survey seemed innocuous until it asked for a bank-account number for depositing funds.

The school system is constantly complaining about their lack of funds, yet here they are spending millions of dollars to renovate their football field.

There's another meaning to the word "fund", which is a bank account or a set of money that's set aside for a specific purpose:

• a mutual fund
• a campaign fund
• a pension fund