How do microservices M/SOA deal with data?

Software developers certainly write code that processes data. We can become blind and less caring to the data that we are asked to process. I certainly understand this way of working when building a service. All we care about is where does that data arrive? Where do we need to push that data? Do we need to save into a persistent store? Do we need to transform the data from one form to another form in the middle of the operation?