Cleanse Google Sheet data by searching for specific words in a columns and replacing them with an alternative. Colour any cell changes to highlight. This is one of many ways of performing the task simply using loops.
Source: The Gift of Script: Find and replace in a Google Sheet
I use Google Apps Script to support staff and students in my job. I enjoy dabbling with creating tools to help with automation and I freely share my learning experiences on my blog, where I also have a number of useful Google Add-ons: www.pbainbridge.co.uk