Expert The Excel spreadsheet app lets you create, view, edit, and share your files with others quickly and easily. Create spreadsheets, data analyses, charts, budgets and more while you view and edit workbooks attached to email messages.expert in The Excel spreadsheet app lets you create, view, edit, and share your files with others quickly and easily. Create spreadsheets, data analyses, charts, budgets and more while you view and edit workbooks attached to email messages.