When you convert crypto dust, you are essentially accessing a feature within a cryptocurrency exchange that allows you to convert small token balances, which are leftover from transactions that are lower than the minimum trading limits on the exchange, to a cryptocurrency that you can actually end up trading outside of the exchange. Typically, within cryptocurrency exchanges that do indeed have functionalities that allow users to clear their crypto dust, users will have to convert small token balances into the cryptocurrency's native cryptocurrency token. What this means is that a user would have to accumulate a specific amount of crypto dust prior to being enabled the opportunity to convert it or, additionally, top up their balance. Whenever you convert crypto dust, you are converting it to a token that has enough value to it that you can then trade or withdraw in the form of FIAT currency down the line, providing you the opportunity to clean things off.