What’s all dried wreath symbolize and where do usually you hang up it? Thank you.

Irina, an evergreen wreath is used mostly (though not only) at Christmas time.
The material and round shape suggest everlasting life through belief in Jesus. Often placed on front door or in main living room.
See Wikiipedia or similar sources for origins, more details.

I have not researched the symbolism of any of the components of my dried wreath, I just enjoy its beauty. I have it hung halfway between my kitchen and eating area above a freestanding antique cabinet holding a collection of old spice tins.