When you prepare a website for the first time, two terms appear constantly: domain name and URL. They are related but answer different questions, and confusing them can make planning your site structure harder than it needs to be. This article uses one hypothetical address to show what each part means and how to keep a clear record for yourself.
What Domain Names and URLs Each Answer
A domain name answers the question “which server am I reaching?” It provides a human-readable address for a web server available on the Internet, replacing numeric IP addresses that are hard to remember and might change over time [s1]. A complete URL answers a broader question: “which specific resource on that server do I want, and how should the browser retrieve it?” A URL is the address of a unique resource on the internet and is one of the key mechanisms used by browsers to retrieve published resources such as HTML pages, CSS documents, and images [s2].12
To make this concrete, consider a hypothetical project address: https://example.org/notes/first-page?view=compact#intro. This string is used purely as an exercise in taking an address apart. It does not point to a real page that exists or has been published. The domain name portion is example.org, and everything else in the string adds further instructions about what to fetch and how to display it.
A domain name has a simple structure made of several parts separated by dots and read from right to left [s1]. In example.org, the rightmost part “org” is the top-level domain, which tells users the general purpose of the service behind the domain name [s1]. The label “example” is the second-level domain. Together they form the domain name that identifies one server. The full URL wraps that domain name inside a larger string that also specifies the protocol, a path, optional parameters, and an optional anchor [s2].12
Breaking Down the Example Address
The hypothetical address https://example.org/notes/first-page?view=compact#intro contains five distinct parts that each play a different role. The scheme is https, which indicates the protocol the browser must use to request the resource [s2]. The authority is example.org, which indicates which web server is being requested [s2]. The path is /notes/first-page, which represents the location of the resource on that server [s2]. The query string is view=compact, introduced by the question mark character. The fragment is intro, introduced by the hash character.2
The question mark signals the start of the query portion. Parameters are extra key-value pairs provided to the web server, and the server can use those parameters to do extra processing before returning the resource [s2]. The hash character signals the start of the fragment identifier, which acts as a sort of bookmark inside the resource, giving the browser directions to show content located at that bookmarked spot [s2]. The fragment is never sent to the server with the request [s2].2
Write down each of these five parts on a separate line before moving on. This simple act of listing them forces you to notice where one part ends and the next begins. The boundaries are marked by specific characters: the colon-slash-slash pattern separates the scheme from the authority, the first single slash after the authority begins the path, the question mark begins the query, and the hash begins the fragment [s2]. Recognizing these delimiters is the foundation for reading any URL you encounter later.2
Comparing Variations With the Same Host
Keep the host portion example.org unchanged and consider what happens when you alter only the path or the query string. The address https://example.org/notes/first-page points to the same server as https://example.org/notes/second-page, but the path differs, so each address refers to a different resource on that server. The domain name alone does not tell you which specific page or file you will receive; the path does that job.
Now compare https://example.org/notes/first-page?view=compact with https://example.org/notes/first-page?view=full. The path is identical in both cases, meaning the same resource is being requested. Only the query parameter changes. Because each web server has its own rules regarding parameters, you cannot assume from the URL string alone how the server will respond to different parameter values [s2]. The string tells you what is being asked; the server decides what to do with it.2
Record these observations as a simple principle: the domain name identifies the server, the path identifies the resource on that server, and the query provides additional instructions that the server may or may not honor in a visible way. This principle helps you predict which changes to an address will definitely produce a different result and which changes depend on server-side behavior you cannot see from the address alone.
Creating an Address Description Card
Use a small table or a plain-text block to create what we can call an address description card for your hypothetical project. The card should have four fields: the purpose of the page, the full URL string, a list of each part labeled by its role, and a short note about why you chose that particular path or query value. For our example, the purpose might be “a compact reading view of the first note in a personal notebook.”
Fill in the card with the five parts identified earlier: scheme https, authority example.org, path /notes/first-page, query view=compact, and fragment intro. Next to each part, write one sentence explaining what it controls. The scheme controls the protocol. The authority controls which server receives the request. The path controls which resource on that server is targeted. The query passes optional instructions. The fragment marks a position within the returned resource.
Check whether any part of your card is optional for your project. In this example, the fragment intro is optional because it only affects where the browser scrolls after loading the page. The query view=compact is also optional in the sense that the path alone still identifies a resource. Noting which parts are essential and which are decorative helps you communicate the address clearly to collaborators or in documentation later.
Verifying the Card by Hand
Manual verification catches typos and missing delimiters that your eyes skip over when you read a familiar string. The process below uses only copying and marking, so no special tools are required.
If a part is missing or misspelled, correct the card and repeat the check from the beginning. This loop takes only a minute but prevents the kind of error that leads to broken links or confusion when you share the address with someone else.
Keep the verified card in the same file or folder where you store other project notes. Having it in one place means you can copy the exact string whenever you need to paste it into a link, a document, or a conversation with a collaborator.
Step 1
Copy the full URL string from your description card and paste it into a blank text file. Do not retype it from memory; use the exact string you already recorded.
Step 2
Starting from the left, mark each boundary character with a space or a line break: place one break after https://, one after example.org, one before the question mark, and one before the hash. You should end up with five visible segments.
Step 3
Compare each segment against the labeled parts in your card. Confirm that the scheme matches, the authority matches, the path matches, the query key and value match, and the fragment identifier matches.
Keeping the Record for Future Use
Store the address description card alongside your other project planning notes. The card is most useful in the early weeks after launch when you are still deciding which pages to create and how to name their paths. Each time you add a new page, write a new card for it using the same four fields. Over time, this collection becomes a simple map of your site structure.
When you share an address with a collaborator or include it in a document, paste from the card rather than retyping the string. This habit reduces the chance of introducing a typo in the path or query, which are the parts most likely to contain characters that look similar, such as hyphens and underscores.
You do not need any special software for this. A plain text file, a notebook entry, or a single row in a spreadsheet all work equally well. The important choice is consistency: use the same format every time so that future you can scan the list quickly and find the address you need without re-deriving it from memory.
Frequently asked questions
Is example.org a real website I can visit?
No. In this article, example.org is used purely as a hypothetical string to practice identifying URL parts. The address https://example.org/notes/first-page?view=compact#intro does not point to a page that has been created or published.
Do I need to include the fragment part when sharing my page URL with someone?
The fragment only tells the browser where to scroll after loading the page. If you share the address without the fragment, the recipient will still reach the same resource; they simply will not be scrolled to a specific section automatically.2
Can I change the query parameter without changing the page itself?
The query provides optional instructions to the server, and each server has its own rules for handling parameters. Changing a query value may or may not produce a visible difference depending on how the server is set up. You cannot determine this from the URL string alone.2