This is the first child chain on Jelurida's main project, Ardor. While the uses of this coin are a tad confusing at first for new investors, you can think of this as an add-on to the main platform. This child chain can be used for financial transactions.
The function of this chain and any in the future is to add something to the platform that Ardor could not do on its own. In this manner, they hope to grow the value of the entire platform over time. The more child chains that are added, the more useful that their entire ecosystem becomes.
Interestingly enough, each of these chains has their own base currency, hence the creation of this asset. This token will be used to pay for services on this financial chain where users will be able to buy, sell and trade various assets which can also be tokenized using this platform. Almost anything now becomes an asset using Jelurida's project. If you're looking to make an Ignis investment then things are looking pretty good.
There are only a few exchanges with listings available that will allow you to buy Ignis. While a few of them are familiar to most investors, the highest volume one likely is not. The biggest trading pair here is the Indonesian Rupiah. Good news if that's your native currency, but if it isn't then you'll need to use Bitcoin to make the swap most likely. While there is an ETH pair the volume is very low.
The wallet options for this currency are a little confusing. This is a sort of "shared asset", and so you'll need a compatible wallet by parent company Jelurida. You can use any of the wallets they have for Ardor to accomplish this goal. They have a web wallet available, which is likely the easiest route to go.