In the Elder Futhark Dagaz is the typically either the last rune, or the second to last rune (some orderings switch it with Aethel). In the Anglo-Saxon Futhorc, it is only the last rune in the 3rd aettir, as a 4th aettir soon takes it’s place. The name means “day” as in the time period when the sun is passing across the sky, and it’s bright light covers that side of the Earth.
I personally find that this is a rune of light, and of Light. While other runes that indicate light are perhaps more personal (Cenaz) or the object which sheds light (Sowilo, Qweorth) Dagaz refers to that special quality of light, seemingly in abudance, surrounding, filling, maybe even penetrating. This is light is also benevolent generally. As in many folklores, when the sun rises is when all the unpleasant things that humans fear retreat back for a while. Life resumes it’s normal pace, and the whispers of harmful beings and unwanted influences fade away, at least for another time span of light.
While it’s nature is benevolent, the results of it’s actions working people, both yourselves and others, is not always. Humans are to a certain degree, hardwired to be blind. Things that don’t meet our sense of self are rejected, either casually and wantonly, or sometimes with anger and potential violence. It takes a lot of work to make yourself into someone who can accept everything, and even if you have done a lot of it, there is probably still something, hiding, secret, laying the darkness, that when it has the light of day shined upon it, the revelation will be challenging, if not outright unpleasant and undesirable. That is part of the human condition, but it doesn’t mean you have to be bound by it.

The revelation, the awakening, letting in the light, seeing things in the light, can be very difficult, and it only gets harder when we fight it. Better to let the light shine, and sit with our discomfort, or sensitivity, our pain, and let it shine through us. It is only trying to help us to shine brighter ourselves, or to be clearer so that our light can shine through, unobstructed.

Let the light shine.