Short answer: The correct answer is E. All of the above. Metadata is data that describes other data: it records information about collected data, includes several elements that describe a dataset’s context, should follow a shared standard so it works with similar datasets, and is critical to sharing data effectively. Each of options A to D is true on its own, so “all of the above” is the most accurate choice.
This page is for students answering the common quiz question “which of the following accurately describes metadata?” and for anyone who wants to understand metadata well enough to use it. I explain why each option is correct, break down the main types with examples, and show where metadata turns up on websites, which is where I work with it every day as an SEO consultant.
The question and why the answer is E
The question usually appears in this form:
- Metadata are critical to effective data sharing.
- Metadata are used to record information about data that has been collected.
- Metadata should be standardised to ensure that data are interoperable with similar datasets.
- Metadata include multiple elements describing the context of the dataset.
- All of the above.
| Option | True? | Why |
|---|---|---|
| A. Critical to data sharing | Yes | Without a description of what each field means, who collected it and when, another person cannot safely reuse a dataset. |
| B. Records information about collected data | Yes | This is the definition: data about data, such as source, date, method and format. |
| C. Should be standardised | Yes | Shared standards such as Dublin Core or Schema.org let different systems read the same fields the same way. |
| D. Multiple elements describing context | Yes | A metadata record is a set of elements (title, creator, date, units, licence), not one label. |
| E. All of the above | Correct | Because A, B, C and D are all accurate. |
A useful exam habit: when every individual statement in a list is true and one option says “all of the above”, pick it. If even one statement were false, E would be wrong.
What is metadata?
Metadata is structured information that describes, explains or locates another piece of data so it can be found, understood, managed and reused. A photo is data; the date, camera model, GPS location and photographer stored inside the file are its metadata. A survey spreadsheet is data; the note explaining what each column means, the units used and when the survey ran is its metadata.
Metadata is not the content itself. It is the label on the box, the catalogue card for the book, or the information in the <head> of a web page that visitors do not see but browsers and search engines read.
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The main types of metadata, with examples
Most textbooks and library guides use three core types. Data and IT teams often add a fourth, technical metadata, which overlaps with administrative.
| Type | What it answers | Example fields | Everyday example |
|---|---|---|---|
| Descriptive | What is this, and how do I find it? | Title, author, subject, keywords, abstract | A library catalogue record; a web page’s title tag |
| Structural | How are the parts arranged? | Chapters, page order, table relationships, sections | Chapter markers in a video; the table of contents of an e-book |
| Administrative | Who owns it, and how is it managed? | Creation date, rights, licence, access rules, retention | A Creative Commons licence on an image; a file’s last-modified date |
| Technical | How was it made, and how is it read? | File format, size, resolution, encoding, camera settings | EXIF data in a JPEG; the character encoding of a web page |
Descriptive metadata
This is the metadata people use to search. For a book: title, author, genre, publication year, ISBN and a short summary. For a web page: the title tag and meta description that can appear in search results.
Structural metadata
This explains how the pieces fit together. A video with chapters, a digitised book where page 12 follows page 11, or a database where an orders table links to a customers table all depend on structural metadata.
Administrative metadata
This supports managing and preserving the resource: who created it, when, under what licence, who may access it, and what software is needed to open it. Archives rely on it so that files remain usable when formats change.
Worked example: metadata for one research dataset
Imagine a dataset of daily air quality readings in Karachi. Descriptive: title “Daily PM2.5 readings, Karachi, 2025”, creator, keywords “air quality, PM2.5”. Structural: one CSV per month, columns date, station, pm25. Administrative: collected by a named organisation, licence CC BY 4.0, last updated 1 January 2026. Technical: CSV, UTF-8, units micrograms per cubic metre, readings averaged over 24 hours. Remove any one of these and someone downloading the file could misread it, which is exactly why option A says metadata is critical to sharing.
Why metadata is standardised
Metadata only works across systems if everyone uses the same field names and meanings. That is the point of option C. Some well-known standards:
- Dublin Core: fifteen general elements for describing any resource, first standardised in 1998 and later published as ISO 15836 (Dublin Core Metadata Initiative).
- MODS and MARC: bibliographic standards used by libraries.
- EXIF and IPTC: embedded metadata for photographs, from camera settings to copyright.
- Schema.org: a shared vocabulary that websites use to describe products, articles, events and businesses for search engines.
If one system calls a field “author” and another calls it “creator_name”, data cannot be merged without manual mapping. Standards remove that step, which is what “interoperable” means.
Metadata on websites and in SEO
This is where most people meet metadata without realising it. When I audit a site, a large share of quick wins are metadata fixes.
- Title tag: the main descriptive label for a page, often shown as the clickable headline in Google. The 2024 Web Almanac found 98% of desktop pages had one. See how to write title tags.
- Meta description: a short summary Google may use in the snippet. Only 66.7% of desktop pages had one in that study. My guide to writing meta descriptions covers length and wording.
- Robots meta tag: administrative metadata that tells search engines whether to index a page. A stray noindex is one of the most damaging mistakes I find; see how the robots meta tag works.
- Canonical tag: tells search engines which URL is the main version of duplicate pages. More in my guide to canonical tags.
- Structured data: Google describes it as “a standardized format for providing information about a page and classifying the page content” (Google Search Central). It can make pages eligible for rich results. See what schema markup does.
- Open Graph tags: control how a link looks when shared on social media and WhatsApp. Check yours with a free social share preview.
- Image alt text and file names: descriptive metadata for images that also helps accessibility. See writing good alt text.
One piece of web metadata no longer matters: Google states the meta keywords tag “has no effect on indexing and ranking at all” (Google Search Central). If an old plugin still fills it in, it is harmless but useless. You can generate the tags that do matter with my meta tag generator, and search engines read them when they crawl and index your pages.
Metadata privacy: what your files say about you
Metadata can reveal more than people intend. Photos taken on a phone can store GPS coordinates; Word and PDF files can store the author’s name, company and editing history. Before publishing documents or images on a website, I recommend:
- Checking file properties for author names and internal paths.
- Removing location data from photos of homes, staff or private sites.
- Exporting clean PDFs rather than uploading working drafts.
Many social platforms strip location data on upload, but a file placed directly on your own server usually keeps everything.
Check your understanding
Metadata self-check
A photo’s file stores the camera model, shutter speed and resolution. What kind of metadata is this?
- Structural
- Technical (often grouped under administrative)
- Descriptive
Camera settings and resolution describe how the file was made and how to read it, which is technical metadata. Many textbooks group it under administrative.
Which is an example of structural metadata?
- The author of a report
- The licence on an image
- The chapter order in an e-book
Structural metadata describes how parts relate and in what order, such as chapters or page sequence.
Why do metadata standards such as Dublin Core exist?
- So different systems interpret the same fields the same way
- To make files smaller
- To encrypt sensitive data
Standards create shared field names and meanings, which makes data interoperable across systems.
Which web metadata does Google say it ignores?
- The title tag
- The meta keywords tag
- The robots meta tag
Google’s documentation says the meta keywords tag has no effect on indexing or ranking. Title and robots tags are both used.
Frequently asked questions
What is the best definition of metadata?
Metadata is data that describes other data. It records information such as what the data is, who created it, when, how it is structured and how it may be used, so that it can be found, understood and managed.
What are the three main types of metadata?
Descriptive (what it is and how to find it), structural (how its parts are organised) and administrative (who owns it, rights and preservation). Many sources add technical metadata, such as file format and resolution.
Why is metadata important for data sharing?
Someone receiving your data needs to know what each field means, its units, where it came from and any limits on use. Without that context they may misread or misuse it, so metadata makes sharing safe and useful.
Is a title tag metadata?
Yes. A web page’s title tag is descriptive metadata that tells browsers and search engines what the page is about. The meta description, robots tag and canonical tag are also page metadata.
Can metadata be a privacy risk?
Yes. Files can carry GPS locations, author names and editing history. Check and remove sensitive metadata before publishing documents or photos online.
Sources
- Dublin Core Metadata Initiative, “Dublin Core Metadata Element Set, Version 1.1: Reference Description” (2012).
- HTTP Archive, “Web Almanac 2024: SEO chapter” (2024).
- Google Search Central, “Meta tags and attributes that Google supports” (last updated December 2025).
- Google Search Central, “Introduction to structured data markup in Google Search” (accessed 2026).
If your website’s titles, descriptions, canonical tags or schema need a proper review, my on-page optimisation service covers page metadata across the whole site, or you can ask me a question.
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