The link href attribute is something that will specify to any developer or web user the URL, or the web address, for the page where that link href has been created. When this attribute is not there, the anchor tag href for that attribute is not a live link, or hyperlink. So basically these attributes are necessary for links to pages to go live. Most developers know this, but the average layperson has trouble deciphering the differences between these href tags and href links, not to mention all of the other terminologies and techniques that normally are used to create websites.
Why should anyone without any web development experience know what a link href is or what a href tags do? Well, it is not really necessary for anyone not developing or creating websites to know this, but it certainly helps. Plus, this information is out there so that prospective developers, people with a slight or a very big interest in entering into this career field, can read all about the purpose of a link href and can ask questions of existing developers to further their own knowledge.
Fortunately both for prospective developers and current ones, and for those simply interested in understanding the href tag syntax and all else that goes with web development and design, there are tons of great resources online. These resources are there simply to help out these people, to help them to understand how a link href is used, how it differs from other tags and references, attributes and values, and how it works in conjunction with so many others to craft excellent websites that have strong functionalities to them. What people learn by discovering these resources is that the link href is among the most important of all attributes, simply because of its specification of web addresses. It basically, then, is a guide for online users, directing them specifically to the sites that they click on.
These resources usually are bookmarked even by experienced developers, particularly to use as references. They may already know what a link href does and how it should perform, but they might also forget some other areas that could help them improve their links and make everything look and function better. So even the most experienced of developers will utilize these references in their creation of web pages, no matter what they already know about the development needs that their clients have.