Select B1 to B10 and simply pull the drag handle down Col B as far as you
want/need to go.
However, if you want the cells to update if the text in B1 changes, enter
=B1 in cell B11, select B11 to B20 and pull the drag handle down Col B as
far as you want/need to go.
Indeed it will - I assumed they might be blanks at present.
However, to overcome this, insert a temporary extra column and set it up as
per my original post. Then select the whole column, copy, select the
original column B and and use Edit, paste special, ticking the box for 'skip
blanks'. This will paste only the necessary text or formulae into your
original column. Finally delete the temporary extra column.