What is the purpose of using borders in css

Question

for example
p {
padding: 12px;
border: 5px solid #000;
}
And also dashed and dotted borders - - - ...

Answer 1

borders can be important if you import something from the web to your website and wanted to distinguish it from yours

Answer 2

Borders can be used for many reasons including:
1. Visually separating different elements on a page
2. Enhancing the user experience
3. When used in conjunction with hover, it may give a visual cue that a link or button can create an action if clicked.