Tracking and kerning are also used interchangeably, but they do not have the same meaning. Tracking and kerning are two different things entirely. Kerning refers to the space between two letters or characters.
There are two basic extremes used in kerning, which are: the letter can be too far apart and also too close together. A good kerning will help your warm-up the feeling of a typeface while a bad kerning will make you feel bad on the inside. Tracking refers to the distance between letters. It can be used when one has discovered the spacing equally between every letter at once. This can be done by programmatically within CSS and also the use of typeface like kerning. Tracking should be done with caution; if not, it can cause readability issues.
These are known to be two terms that are often used interchangeably, but they have different meanings. It is important that you will get to know their difference so that you will know how to use them properly. When you say kerning, this means that you would need to adjust the spacing between two letters.
There are times when you put too much or too little space, depending on the type of design that you want or what you are following. When you say tracking, this means that you are going to apply the same amount of space for all of the characters that are available in a given selection.