
It is specifically for restoration druids so they know exactly when and who to Swiftmend.
GridSwiftmend is ment to remind you when you have the ability ready and you can set threshold values for health and time left on the HoTs so you can get the most out of Swiftmending.
Setup
I would recommend that you use as a Border Status as they are very clear to spot in the Grid along with the center text (see image).
There are several ways you can tweak the settings. The most important setting is of course making the status visible in grid.
You are going to want to set the "Critical Health Threshold" setting also. If a unit goes below this amount of health and has a Regrowth or Rejuvenation spell on him (and your Swiftmend is ready) the status will activate. Citical Health Threshold is especially important if you use the Swiftmend Glyph since you then don't care about being mana efficient with your Swiftmends in quite the same way.
If you on the other hand don't have the Swiftmend Glyph then you will also be quite interested in the "Health Threshold" and "Time Threshold" settings. The say that if a unit is under a certain percentage health and has a Regrowth or Rejuvenation spell on him with less than the time specified left on it THEN the status will be shown.
Some choose to set the Time or Health Threshold (not the Critical one) to their min values if they use the Swiftmend glyph. That way only the Critical setting counts. But you should be OK using the default settings (thats what I do myself).