Second person and first person

In general, use second person in your docs rather than first person—you instead of we.

It's also important to figure out who the you is that you're addressing (a developer? a sysadmin? someone else?), and to be consistent about that. Make it clear to the reader who you expect them to be (sometimes with an explicit audience sentence near the beginning of the document).

Example of we versus you:

Not recommended: If we're deleting multiple entries at a time ...

Recommended: If you're deleting multiple entries at a time ...

If you're telling the reader to do something, then use the imperative, with an implicit you. For example:

Recommended: Click Submit.

This issue can also interact with tense:

Not recommended: You'll need to create an XML entry.

Recommended: Create an XML entry.

It's generally best to avoid our.

Not recommended: For details, read our documentation.

Better: For details, read the documentation.

Recommended: For details, read All About Pandas.