What is the difference between a Free SSL Certificate rather than a paid one?

Enough has been written here about the difference between paid and free SSL certificates. I will write when it is important to use a paid SSL certificate:
1. For online shopping;
2. If the site conducts financial transactions;
3. High online and popular project;
4. Conference user data.
Also, don't forget to pay the rent on time. You can enable special monitoring of the site to monitor the indicators and do not forget to pay the domain and SSL certificate on time.