Definition of Encoding:
Encoding refers to the process of representing information or data in a specific format that can be easily understood and interpreted by computers or other electronic devices. It involves converting data into a series of codes, symbols, or signals, which helps in transmitting, storing, or displaying the information accurately.

HTML Subtitles Markup Formatting:
HTML provides various markup formatting options that can be used to enhance the appearance and structure of subtitles. Some commonly used markup tags for subtitles include:

<b> : This tag is used to make the subtitle text bold.
<u> : This tag is used to underline the subtitle text.
<i> : This tag is used to italicize the subtitle text.
<code> : This tag is used to indicate computer code within the subtitle text.
<mark> : This tag is used to highlight or mark important sections of the subtitle text.
<del> : This tag is used to indicate deleted or removed parts of the subtitle text.
<ins> : This tag is used to indicate inserted or added parts of the subtitle text.

By using these HTML markup tags, subtitles can be styled and formatted according to specific preferences, allowing for better readability and visual appeal.