Insert Columns and Rows Using the Keyboard
To insert a columm using the keyboard, you first have to highlight the column
Highlight a Column
To highlight a column in Excel, place the cursor anywhere in the column you want to highlight
Press Ctrl + Spacebar
This will highlight the column
Insert Column
Press Ctrl and + (repeat this step for multiple columns)
It will insert a column to the left of the highlighted column
To insert a row using the keyboard, you first have to highlight the row
Highlight a Row
To highlight a row in Excel, place the cursor anywhere in the row you want to highlight
Press Shift+ Spacebar
Insert Row
Press Ctrl and + (repeat this step for multiple rows)
It will enter a clear row above the row you have highlighted

These tips are very useful, look forward to seeing more.
Thank you.