Neteller is another ewallet option along the lines of Paypal. You register an account and can then use your Neteller account to pay into your bingo account and pay out wins. The advantage of Neteller over Paypal is that it's accepted at a lot more bingo sites than Paypal and there's an affinity between online gaming and the ewallet service. The downside of Neteller is that it does cost to withdraw or transfer cash.
The downside of Neteller is that it does cost to withdraw or transfer cash. This makes it less favourable compared to Paypal and if you're choosing one or the other then this may tempt you towards Paypal. Another disadvantage of Neteller is that payments and transfers can take a few days to reach their destination. The obvious advantage of using Neteller or similar is that only one account has your credit card details - and not multiple bingo sites. If you're worried about security then an ewallet option may well suit you.
If you've not tried Neteller before then the above video gives you a quick demonstration!
It's also worth noting that players using Neteller to deposit may not always get bonuses that are offered by a bingo site. There may also be differences in the minimum deposit amount and minimum withdrawals compared to using debit cards.