I'm following this post to categorize data in Google Sheets using regular expressions.
The person who wrote the answer was able to get the formula to automatically write down the category in column D.
I assume they used ArrayFormula to achieve it, but I can't seem to get it done. Or they just paste the formula to each cell of the column. I'm not sure.
Here is the sample Sheet I made as an example.
What I am looking for is to categorize data in column C based on the keywords in column A.
Does anyone know how to do it? Thanks so much.