This tutorial explains how to create a link in your spreadsheet.
Select the cell. Start typing, "=hy" (without the quotes). The following directions come up.

2. Be sure the format looks like: =hyperlink("URL","text"). Then press Enter. See the example below.

3. Your link looks like the following.

4. To view the links such as the one below on an iPad, tap the link, then tap, "Open in Safari".
