Links allow a person to move around a webpage, move from one page to another, or link to a completely different website. Clear links make it easy for someone to know where they are going to be taken. You don’t want to make links hard to find because it will make it more difficult to navigate your page.
If you have a lot of different pages on a site it may be best to organize these into different folders. These folders are called directories. These directories keep the site root folder organized and easy to find when coding the site, and it helps to have these in organized in which order you will navigate through these pages.
These boxes that are on a webpage are sized with pixels, percentages, or ems. You pick which type of sizing you want to use based on how you want them to look on the webpage. These boxes are often made to fit the size of the screens they are viewed on and will change depending on its size.