Why won't my iPhone read word documents?

It used to before one of the updates,
I could just do the two finger swipe down from top thing and it would read my Microsoft word documents,

Now all it says when I do this is "page one of two track change is off"

So I guess I have two questions?
*how can I make My phone read it to me again
*what the heck does "track change is off" mean

You need to get an office app