Fundamentally, a Marcus bank UK account is a pure savings account, and that’s all. It is not a current account that you can pay your salary in to, you can’t set up direct debits and there is no bank card.
The way that it works, is that the Marcus savings account is linked to your main current account, the one you currently use for your day to day banking.
For security, this means that you can only put in money from, and withdraw money out, to that linked account.
One thing to be aware of is that you can only transfer in or out £10,000 at a time, for security.
In practice, because of this set-up, I found that I almost completely forgot about the account. As a result, I was able to adopt a true ‘set and forget’ mentality. This has helped protect my savings from whimsical and impulsive spending urges. It’s slightly more of a faff to get to your money, and that’s a good thing.