Change Font Size in Golden Eagle Homepage feature

I need to make the font smaller in this section, can you tell me how, I have read the copy code to custom css but I am not sure how it then works, can you let me know,
Thanks

 

Hello,

Paste the code given below in Custom CSS section
(Appearance -> Theme Options -> Styling Options -> Custom CSS) of your dashboard.

Code:

.content h1 {
font-size: 20px;
}
.feature-content .feature-box-inner h1 {
font-size: 20px;
}
.feature-content .feature-box-inner p {
font-size: 12px;
} 

You can adjust the value of "font-size" as per your requirement.
This will solve your issue.