Why to use strings.xml?

Question

Could anyone please explain why having hard-coded strings is so bad? What issues should I expect if I hardcode strings? Why having a separate string xml file solves those is

Answer 1

Plus, suppose you have a string, let it be a title for example, that is repeated in every activity of your app. Now suppose after awhile, you decide to change that title.

Using strings.xml you will need to change it in a single place, while hard-coded values will need to be changed in every activity.