In a simple way, metadata is data that provides information about other data, or data about data such as wikipedia . If you understand programming you can easily associate this with the concept of
For example, in an image, a datum referring to that image ( size, etc. ) can be used to create the information also referring to this image, through which any entity can know that the image x has y of size.
In a webpage, or in a
HTML document that in principle has as main objective the construction of the skeleton of the website, the idea is the same, to state how the page is organized, saying where are the headings, titles, content and so on, using key words specific to each area of the document. In a word document, or any other word processor does almost the same thing, if not in the whole - XML .
Another example could be the
tags you used when creating this question:
html and feature-language
I, even before viewing the question, was able to know that it is related to
html , and when viewing the content of the question, I saw "words" in bold, with a larger font than the rest of the page, and I was able to know what the title was, and when I saw the text with regular font below the title I also knew that it was the content, at the end, when I read it, I could see that it is really related to
tags were wrong, even though I read the content (which deals with C) , I would be confused because, imagine: I came here waiting to find content about html, but I found something different, how do I deal with it? . It would be worse if the question did not have any
tag , I could clearly see that it's
HTML so it's linked to the title, and the question is on the main page of the site, but someone browsing the tags
HTML would have even found the question?
Although an example with people, when talking metatags refers to the digital world.