Ether is used to pay for transactions on the Ethereum network, like paying for the use of decentralized apps built on Ethereum.
You can check out State of the Dapps for a list of decentralized apps built on Ethereum.
Moreover, Ether can also be traded for Bitcoin, other cryptocurrencies, and national currencies. However, its primary purpose is to pay for applications on Ethereum. Unlike Bitcoin, you won’t be able to use Ether to buy things online (unless there is an application on Ethereum for it).
Hence, you cannot use your Coins.ph Ethereum wallet to cash in, cash out, buy load, pay bills, and purchase game credits.