Do you have the recipe of your brew? How strong the beer is, the intended fermentation temperature, and ingredients in the recipe could all contribute to a stuck fermentation
Yeah, more details will help but the usual steps are
- Warm it up
- Swirl the fermenter to get the yeast moving again
- pitch more yeast
- Sigh and accept it's not moving and wait a week to see if it moves
- Toss it in a keg, hope it tastes good and move on