Hey Cristina! We receive community feedback through so many different channels and integrate community feedback in quite a few different ways too.
User testing has played a big part in developing existing features (especially in their early days) and also in identifying problems which require a solution from us 
They’re normally held at the office every other Thursday and you can sign up via a link which is normally posted on Twitter a few days before hand.
A lot of similar feedback has come from here, on the forum. The design team often post sneak peeks of work in progress. The suggestions and feedback on these play an big part in our considerations as I’m sure our Head of Design @hugo can attest to! Targets was launched around 5 months after the first sneak peek was posted here and the later iterations reflect some of the suggestions raised in the thread.
At times we have a problem we need the community to help us solve, the biggest example of this being our name change last year.
In December we held our first community workshop focusing on the forum and how we could show it some more love. We came away with lots of valuable pointers and a clearer plan of action. One of the bigger requests which had been echoed in some of the threads here, was the need for more easy to find documentation on exactly what Monzo is and how it works. Zainab has reviewed our Help page and made some great progress in updating this into a more comprehensive list of important things to know. We’ll be running these workshops bi-monthly, each with a different focus. We’ll also be making more effort to share the learnings from these sessions more widely for additional input, before we turn them into some positive actions. The next workshop discussion will be based around ideas for new Offline Experiences and ways to make existing ones even better. You can register your interest here https://monzo.typeform.com/to/EHU0MX?email=xxxxx
It’s a big part of my job to make sure that we’re turning your thoughts and feedback into something constructive and beneficial for all our users. I’m always interested to know how best to show that we’re listening