There are numerous trophies up for grabs as you progress through the 100 Day Journey. You can view your trophy cabinet here.
Once you achieve a trophy, by clicking the trophy you will see a progress bar showing how close you are to reaching the next level.
To achieve the stage target trophies, you must first set your stage target at the beginning of each stage.
Some trophies have downloadable certificates you can print and others you are able to share on social media.