Domain Authority (DA) is the measure of influence and authority given to a website as a score out of 100 by Moz. High DA backlinks are the most sought after by link building experts. To provide high quality link building service, we take into consideration the level of influence (DA10, DA20, DA30 or DA40+) based on your choice – with DA10 websites being the lowest Domain Authority we consider for link building, and DA40+ being the higher end of the spectrum.