Haw many times you have thrown a party without ever giving importance to the appearance of the venue?
You would have carefully picked your menu, ensured that the best food is prepared with neatly laid tables with candles and all those things. But your guests' first view will be your house if that is where you are giving the party.
Your party decoration ideas set the mood of the party. They can be fun or formal, but they should fit the purpose and theme. If you are lacking in ideas here is where you will find some very popular themes and ideas, along with supplies, decorating ideas, recipes, activities and more.
But if you want some unique ideas, please let me know. I may be able to help if time permits.