Create an experience and/or a physical prototype of the possible solution chosen to test with your target users.
Test the prototype and reflect on how to improve it. Ask users for feedback. Continue iterating a solution with cycles of make-test-feedback-reflect-re-make until a solution is clear.
If needed, you can go back to the ideate stage and choose a different idea to focus on or even back to the first stages to better define the user.
Once you have refined your prototypes into a meaningful solution, you can put it into
action.
You can also take it to the next step and share it with others.
https://www.thinkwithgoogle.com/collections/prototyping-ideas.html