Data science is the field related to extracting out the useful and informative insights from raw data and having a powerful impact on the decision that will ultimately boost the business.
Machine learning allows computers to autonomously and own its own to learn from the amount of informative data that is available.
Machine learning in Data Science can be used to build automated predictive models
and helps to automate the different phases of Data Science life cycle from Data preparation to Data analysis.
See this Machine Learning Course for more information :