How to troubleshoot a Ford Focus engine that won't start?

I have a 2014 Ford Focus and it won't start. I have checked the battery and it is charged. What could be causing this issue and how can I fix it?

It could be an issue with the starter or the ignition system. I would recommend checking those components and also making sure the spark plugs are in good condition.

Another possible cause could be a faulty fuel pump. I suggest checking the fuel pressure and replacing the pump if necessary.