How to choose optimizer and loss— Keras Python neural network

Hi guys, I just programmed my first neural network in Python using keras, but I’m not sure what loss functions and optimizer to use. I used mean squared error, which worked well, but I only have experience in the past using r2, so it’s not optimal. I am currently using ‘Adam’ as my optimizer, but I really don’t understand what this does. I am currently doing regression 28 input neurons leading to 1 output neuron, if that’s helpful. Thanks in …

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