1. First of all , you need to read your input excel using read range activity inside Excel application scope.(you will get the datatable from here)
2. Now use for each row activity to iterate through each row of the datatable .
3.use below logic:
for each row of Data table
string = Row(1).tostring
excel application scope[
write cell activity in the range section use the "B"+(count+2).tostring
in value section = "www.xyz.com\string"
4. Write range will give you the output as you expected.