That’s a beautiful bracelet, @tonia! 
If a witch gifted them to the bridesmaids, you can be sure that each knot is full of magickal intention 
. What kind of intention would depend on the witch who tied the knots!
If you are interested in learning more about Knot Magick, I recommend reading through the resources listed in the Knot Magick Challenge Page 
There’s a lot to learn and knot magick is a fascinating aspect of the craft! 
Blessed be 