What do you understand by data extraction? List out few advantages of data extraction tools.

Data extraction is the act or process of retrieving data out of (usually unstructured or poorly structured) data sources for further data processing or data storage (data migration). The import into the intermediate extracting system is thus usually followed by data transformation and possibly the addition of metadata prior to export to another stage in the data workflow. Advantages of using data extraction tool are as under: Use of data extraction tools reduces manual process and repeated tasks requirements and helps in improving the accuracy of the extracted data. Data extraction tools quickly extract large data sets within short time, thereby help in saving time and allow focusing on other core tasks. With appropriate tools in place employees now spend more time on tasks that add value to business and hence their overall productivity is drastically improved. Data extraction tools provide full visibility of all the records and makes management of stored data easy. By automating time consuming tasks companies now do not need to hire extra staff and hence save on overhead costs considerably.