Data Science related to Big Data, Data-Driven Decision Making and its Application

In today's time data scientist is needed in every sector. As today's era is going on, we are seeing that anyone go to buy even a small thing, then first do a research on the internet, then we go to buy it. Consider that we have to go to purchase a mobile phone, now we search on the internet, according to our budget, so we get many search results, which we can say that the result is the Big Data. Now we are according to our specifications, we choose 10 phones, which is called data mining, now we shortlist the mobile phone according to the specifications, need and budget, in the end, we think to purchase a mobile phone which is called decision making. In the above example I am trying to explain the need of Data Science in today's time. Our objective in this research paper is that using data science, how can we tell a relationship with big data. Which helps us in decision making.