A keyword search lets you find specific words or phrases in a document, on a webpage, or across the internet. The fastest way to do it on any computer is to press Ctrl + F on Windows or Command + F on Mac, which opens a small search bar where you type the word you’re looking for. But keyword searching goes well beyond that one shortcut. Here’s how to do it in every common situation.
Find a Word on a Webpage or Document
On a desktop or laptop, press Ctrl + F (Windows) or Command + F (Mac) in virtually any application: web browsers, PDFs, word processors, spreadsheets, even email clients. A small search bar appears, usually near the top or bottom of the screen. Type your keyword, and the software highlights every match on the page. Press Enter or click the arrow buttons to jump from one match to the next.
This works in Chrome, Firefox, Edge, Safari, Microsoft Word, Google Docs, Excel, and most other programs. If you’re looking at a long contract, a research paper, or a 5,000-word article, this shortcut saves you from scanning every paragraph manually.
Search on a Phone or Tablet
Mobile browsers don’t have a keyboard shortcut, but they all have a find-on-page option tucked into the menu.
- Chrome on Android or iOS: Tap the three-dot menu icon in the upper-right corner, then select “Find in Page.” Type your keyword, and the browser highlights each match. Tap the up or down arrows in the search bar to jump between them.
- Safari on iPhone or iPad: Tap the Share icon (the box with an upward arrow), then swipe along the bottom row of icons until you see “Find on Page” with a magnifying glass. Tap it, type your keyword, and Safari jumps to the first match automatically. Use the arrows next to the search bar to move forward or backward through results.
Search the Entire Web With Keywords
When you type keywords into Google, Bing, or another search engine, the engine scans billions of pages and returns the ones most relevant to your terms. Getting good results depends on choosing the right words and combining them effectively.
Start with the most specific terms you can. Searching “leaking kitchen faucet single handle repair” returns far more useful results than just “faucet problem.” Drop filler words like “how do I” or “what is the best way to” unless you’re asking a very specific question. Search engines mostly ignore those common words and focus on the nouns and verbs that carry meaning.
Use Quotation Marks for Exact Phrases
Wrapping your keywords in quotation marks tells the search engine to find that exact phrase, in that exact order. Searching “test anxiety” returns pages where those two words appear side by side. Without quotes, the engine might return pages that mention “test” in one paragraph and “anxiety” in another, which may not be what you need.
This is especially useful when you’re searching for a specific name, a quote you half-remember, an error message from your computer, or a multi-word concept like “compound interest calculator” where word order matters.
Narrow Results With Boolean Operators
Boolean operators are simple words (AND, OR, NOT) that tell a search engine or database how to combine your keywords. They work in Google, library databases, and most research tools.
- AND narrows your search. Every term must appear in the results. Searching “cloning AND humans AND ethics” returns only pages that discuss all three concepts together.
- OR broadens your search by accepting any of the terms. Searching “cloning OR genetics OR reproduction” returns pages about any one of those topics. This is helpful when a concept goes by multiple names or synonyms.
- NOT excludes a word. Searching “cloning NOT sheep” filters out results about Dolly the sheep so you can focus on other cloning research.
When you combine AND and OR in the same search, use parentheses to group the OR terms together. For example, “ethics AND (cloning OR bioengineering)” tells the search engine to find pages about ethics that also mention either cloning or bioengineering. Without the parentheses, the engine may misread your intent and return unrelated results.
Filter by Website, File Type, or Title
Search engines support special operators that let you filter results in ways the regular search bar doesn’t offer. In Google, you type these directly into the search box.
- site: limits results to a single website or domain type. Searching “degree requirements site:edu” returns only pages from university websites. You can also target a specific site, like “return policy site:amazon.com.”
- filetype: limits results to a specific document format. Searching “budget template filetype:xls” finds downloadable Excel spreadsheets. Common file types include .pdf, .doc, .docx, .ppt, and .xls.
- intitle: limits results to pages that contain your keyword in the page title, which usually means the topic is central to the page rather than mentioned in passing. Searching “intitle:beginner guitar lessons” returns pages specifically built around that subject.
You can combine these with regular keywords and with each other. A search like “climate change research filetype:pdf site:gov” returns PDF documents from government websites about climate change research, filtering out blog posts, news articles, and commercial sites in one step.
Search Within a Database or Library Catalog
Academic databases, library catalogs, and specialized search tools (for legal cases, medical journals, patents, and similar collections) work on the same keyword principles but offer more structured options. Most have an advanced search page with separate fields for title, author, subject, date range, and publication type.
In these tools, quotation marks and Boolean operators are especially important because the databases index content precisely. Searching “college students” AND “test anxiety” in a research database returns articles where both exact phrases appear, giving you tightly focused academic results. Many databases also support wildcards: typing “ethic*” matches “ethics,” “ethical,” and “ethicist” all at once, saving you from running multiple searches.
Tips for Getting Better Results
If your first search returns too many irrelevant results, add another specific keyword to narrow things down. If it returns too few, remove the most restrictive term or swap in a synonym. Think about the language the source would use. A medical website describes “hypertension,” while a general health blog says “high blood pressure.” Matching the vocabulary of your target source gets you there faster.
Pay attention to what the search engine suggests as you type. Autocomplete suggestions reflect what other people commonly search for, and they can help you find the phrasing that returns the best results. If you’re researching a topic over multiple sessions, keep a short list of the keyword combinations that worked so you don’t repeat dead-end searches.