Dragons are very wise and strong creatures, in most religions they are praised like guardians. Dragons play roles in some peoples lives as, guardians, protectors, and wisdom givers. Dragons are often invoked for these reason, to either aid them in streingh or wisdom.
In remider dragons are not physical things, they are astrally found. Now in some religions there are dragons for each element. These dragons are invoked for different spells, to either impower or to earn an extra boost.