Install Microsoft Word or a compatible document editor from the app store
Open the app and sign in if required
Tap the file you want to edit from your phone storage, email, or cloud drive
Tap the document to open it
Tap the edit icon or enable editing mode
Make the changes you need using the on-screen keyboard
Use the formatting tools to change text style, alignment, or layout
Save the document after editing
Use Save As if you want to keep a separate copy
Share or export the edited file if needed