What do you call this type of embroidery?

I’m hoping to do this type of embroidery on an already existing knit. I would Google it, but I’m not sure what it’s called. Kind of makes it difficult to do a search.

I’m looking for the type of embroidery that follows the existing “V” stitches of a sweater. I know it seems rather self-explanatory. I was just hoping to find some tips on how to keep it clean on the back-side and how to finish it off.

Example: (for the letter A)
VVVVV V VVVVVV
VVVV V V VVVVV
VVV V V V VVVVV
VV VVVVVV VVV
V V VVVVV V VVV
V VVVVVVVV V VV

Thanks!