While completing the game, here and there you will have to make important decisions which concern nearly the entire storyline. The choices vary in their characteristics; they may concern picking the ally or determining the fate of a specific party member. Depending on the variant that you choose, results may either be instantaneous, or you can learn them only after some time has passed (e.g. during another meeting with a representative of a given faction).
The key element here is to be able to recognize the important choices, thanks to which you will know when you need to give it a deeper consideration. The most important choices are provided with short descriptions that display, after you highlight a given option (an example in the screenshot above). This is helpful because, by highlighting one of the options, you can learn what the result will be. Of course, the game does not lay everything plain and if you want to take precautions, you can save the game before making the important decisions and test the possible variants.
NOTE - All of the main storyline choices have been presented in the walkthrough for the game.
NOTE - To look up the results of the decisions that you take, you can use the Dragon Age Keep app, which allows you to reveal the most important choices and modify them. This has been described in the Character Creation chapter.