Domain Names and URLs: Understanding Website Addresses Before Launch

When you prepare a website for the first time, the string in the address bar is more than just a name you picked. Understanding what each part of that string does helps you plan content, share links accurately, and troubleshoot problems later.

A Hypothetical Address to Read Together

Suppose you are planning a small personal project and you sketch out the address https://example.org/notes/first-page?view=compact#intro on a piece of paper. This address is purely hypothetical; no such page is claimed to exist or be live. It serves only as a string we can take apart to see how each piece fits. The domain portion, example.org, identifies a web server by a human-readable name. Domain names exist because computers on the Internet are reached through numeric IP addresses that are difficult for people to remember, and a domain name provides a readable substitute for those numbers.¹

The full string, however, is a URL. A URL is the address of a unique resource on the Internet and is one of the key mechanisms browsers use to retrieve published resources such as HTML pages, images, or stylesheets. Where the domain name answers the question “which server should I contact?”, the complete URL answers “which specific resource on that server do I want, and under what conditions?” That distinction is the starting point for everything else in this article.²

Keep this single example in mind as we move through the remaining sections. Every observation below refers back to the same string, so you can follow along with a pen or a text editor and verify each label yourself.

Labeling Each Part of the Example

Write the address https://example.org/notes/first-page?view=compact#intro on a fresh line and mark each segment. The opening portion, https, is the scheme. It tells the browser which protocol to use when requesting the resource; for websites this is typically HTTPS or its unsecured version HTTP. The authority that follows the separator :// contains the domain name example.org, which indicates which web server is being requested. In many URLs a port number can also appear here, but it is usually omitted when the server uses the standard port for HTTPS.²

After the authority comes the path /notes/first-page. The path points to a resource on the web server. In the early days of the web a path represented a physical file location, but nowadays it is mostly an abstraction handled by web servers without any physical reality. Following the path, the question mark ? introduces the query string view=compact. Query parameters are extra key-and-value pairs provided to the web server, and the server can use them to do additional processing before returning the resource. Each web server has its own rules regarding parameters.²

Finally, the hash symbol # introduces the fragment identifier intro. An anchor represents a sort of bookmark inside the resource itself, giving the browser directions to show the content located at that bookmarked spot. It is worth noting that the part after the hash, also known as the fragment identifier, is never sent to the server with the request. So in our example, the question mark signals the start of the query and the hash signals the start of the fragment; everything between them belongs to the query, and everything after the hash belongs to the fragment.²

Comparing Variations While the Host Stays the Same

Now keep the host portion example.org fixed and imagine two alternative addresses. The first is https://example.org/notes/second-page?view=full and the second is https://example.org/gallery/thumbnails?sort=date. In both cases the scheme and the domain are identical to our original example. What changes is the path and the query string. The path in the first alternative points to a different resource under the same notes directory, while the second alternative moves to an entirely different directory called gallery. The query parameters also differ: view=full versus sort=date. These are purely string-level observations about what characters appear where; we are not inferring how any particular server would handle them.

This comparison shows that the domain name alone does not tell you which page or resource someone is referring to. Two people could share the same domain and still be talking about completely different content, because the path and query carry that additional information. When you document or share an address, including the full path and any query parameters ensures the recipient can locate the same resource you intended.

The fragment behaves differently from the path and query. If you change the fragment from #intro to #summary while keeping everything else the same, the browser would still request the same resource from the server but would scroll to a different bookmarked position within it. Because the fragment is never sent to the server, two URLs that differ only in their fragment point to the same server-side resource. This is a useful distinction to remember when you are deciding which parts of an address to include in a reference card.²

Building an Address Description Card

Record the following information on a card or in a plain-text file for your hypothetical project. Start with a short statement of purpose, for example: “Address for the first page of my reading notes, displayed in compact view, scrolled to the introduction section.” Then write the full address https://example.org/notes/first-page?view=compact#intro on its own line so it is easy to copy without accidental edits.

Below the full address, list each part with a label. Scheme: https. Domain: example.org. Path: /notes/first-page. Query: view=compact. Fragment: intro. Writing these out separately forces you to notice where each boundary character falls. The slash after the domain begins the path, the question mark begins the query, and the hash begins the fragment. If any of those boundary characters is missing or misplaced, the address means something different.

You may also add a brief note about which parts you consider essential for sharing. In this hypothetical case, the scheme, domain, and path are necessary to reach the resource. The query parameter view=compact changes how the resource is presented, so you might include it when you want the recipient to see the same presentation. The fragment #intro only affects the scroll position within the page, so you could omit it in a short reference without changing which resource is loaded. These are choices you make based on your own communication needs, not rules imposed by any specification.

Verifying the Card by Hand

Before you rely on your description card in any real communication, check it against the original string character by character. The following steps are author suggestions for a simple manual review; they do not require any special tools.

This process takes only a minute or two, but it catches the most common mistakes: a missing slash, a question mark placed after the query instead of before it, or a fragment identifier that was accidentally included in the path field.

If you find a discrepancy, correct the card immediately and re-read the full address once more. Building the habit of a quick verification pass now saves confusion later when you share the address with collaborators or paste it into documentation.

Step 1

Copy the full address from your card into a blank text line. Then copy the original address https://example.org/notes/first-page?view=compact#intro into the line directly below it. Compare the two lines character by character from left to right, paying attention to the positions of the colon, slashes, question mark, equals sign, and hash.

Step 2

Check each labeled part on your card against the corresponding segment in the full address. Confirm that the scheme field says https and nothing else, that the domain field says example.org with no leading or trailing slash, that the path field starts with a slash and reads /notes/first-page, that the query field reads view=compact without the question mark, and that the fragment field reads intro without the hash symbol.

Step 3

Record the date of your check and note any corrections you made. If you later change the address for your project, update the card and repeat the comparison so the card always reflects the current version.

Keeping the Record for Future Use

Store your address description card somewhere you will find it again when you write documentation, share links with collaborators, or return to the project after a break. A plain-text file in your project folder works well because it is easy to search and does not depend on any particular application. The goal is not to build an elaborate system; a single short file that you actually open is more useful than a complex template you never fill in.

When you eventually add more pages to your project, you can extend the same format. Give each address its own card or add a new entry to a list, always recording the purpose, the full address, and the labeled parts. Over time this collection becomes a quick reference that saves you from re-reading long strings and guessing where one part ends and the next begins.

The choices you make about what to include are personal. Some people prefer to record every fragment because they want exact scroll positions; others omit fragments because they consider them temporary. Neither approach is wrong. What matters is that your record is consistent enough for you to trust it later, and that you can explain to another person which parts of the address are essential and which are optional. That clarity is the practical payoff of spending a few minutes labeling a hypothetical string before your site goes live.

Frequently asked questions

In the example address, does the fragment #intro get sent to the server?

No. The fragment identifier is never sent to the server with the request. It only tells the browser where to scroll or jump within the already-loaded resource.²

If I change only the query parameter from view=compact to view=full, am I requesting a different resource?

The path and domain stay the same, so you are requesting the same base resource from the server. However, the server may use the different parameter to change how it presents that resource. The exact behavior depends on how the server is configured.²

Do I need to include the scheme https when sharing my address with someone?

In most browsers, typing a domain without the scheme will default to HTTP or HTTPS automatically. Still, writing the full scheme in your reference card removes ambiguity and ensures the address is complete if someone copies it into a context that does not add the scheme for them.