These are significant seals just like most of them, I suggest you to look for information via Google or any other searching engines.
Seals including the seals of Moses you're talking about (generally talking) are said to be extraordinarily powerful in ceremonial magick and you can still purchase copies of them in stores. Basically the seal is either drawn or purchased, then anoited for a specific purpose, Oils were carefully dabbed around the edges of the sigil top seal in the magick that was about to be performed.Candles were also anointed and set over the top of the seal before a specific ritual was done. When the ritual completed and the candle burned down to the end, the seal was carried or hung in one's home to manifest the purposes for which it was called forth.
Seal can be made into talismans. A talisman is considered "big guns" magick bc it takes you a while to make it.Talismans are in the realm of the angels. When you work with an amulet , you are pulling in practical earth energy, which is powerful in its own right, but does not focus on cosmic energy. When working with talisman you truly working with angelic energies, and this is an entirely different form of energy.
Feel free to get more information. :)