What is editing in research methodology?

At the stage of Analysis of Data: After data collection, the task of analyzing is to be done. The analysis requires number of operations such as establishing categories, application of catagories to raw data through coding, tabulation and then drawing stastistical intererences. Editing is the procedure that improves the quality of the data for Coding.* C.R. Kothari, Research Methodology, Methods and Techniques , New Age International (P) Limited, Delhi, 2008 p.18