This option helps you to hide one or more columns from your sheet that you do not want to view. For example if you have created a new view of your sheet and want to just work on 4 out of the 5 columns in the sheet you can hide the column that you don’t want to see.
To hide a column, click on the hidden option and select the rows that you want to hide.
The number of hidden columns will be indicated in the hidden option in the top bar.
You can also hide individual columns by selecting the hide option in the properties of that column. Properties of the column can be seen by clicking on the down arrow icon next to the column name.