Fill justify is  the  most unused but most powerful  in Excel. And, whenever you need to combine text from different cells you take help of it and  use it.
The best thing is that  you need a single click to merge  the following texts. Have a look at the data  provided   below and follow the steps.
at first, make sure to increase the width of the column where you have text.
Secondly, select all the cells.
At last, go to the Home Tab ➜ Editing ➜ Fill ➜ Justify.
This will merge the present  texts from all the cells into the first cell of the selection.