UTM Parameters Explained: How to Tag Campaign Links Properly
UTM parameters explained: what utm_source, utm_medium and utm_campaign mean, and how to tag campaign links properly so your GA4 reports stay clean and readable.
What Is robots.txt? A Beginner’s Guide With Examples
A robots.txt file is a plain text file that tells search engine crawlers which parts of a site they may visit. This beginner’s guide explains its four rules, what it cannot do, and five mistakes to avoid.
How Compound Interest Works — and Why Compounding Frequency Matters
Compound interest is interest earned on your interest. See the formula in plain language, a year-by-year example, and why time matters more than frequency.
What Counts as a Business Day? Weekends, Holidays and Working Days
A business day is usually Monday to Friday, excluding public holidays — but the count changes with holidays, weekends, and the counting convention. Learn how to count business days correctly, with worked examples.
What Are Open Graph Tags? How Your Link Looks When Shared
Open Graph tags decide the title, picture and description a shared link shows. Learn the four required tags, the image rules, and how to fix a card that still shows the old preview.
What Is Base64 Encoding — and When Should You Use It?
Base64 turns any data into plain, portable text — but it is not encryption, not compression, and not a way to hide anything. Learn how it works and when to use it.
What Makes a Password Strong? (Length, Uniqueness, and Randomness)
A strong password is long, random and used for one account only. Learn why length matters most, how randomness works, and what a strength checker can and cannot tell you.
Percentage Increase vs Decrease vs Change: Which Do You Need?
Percentage increase, percentage decrease and percentage change sound like three different calculations. They are really one formula read three ways — and the base you divide by decides everything.
KB vs KiB: Why Your 1 TB Drive Shows About 931 GB
A 1 TB drive holds a full trillion bytes — so why does your computer show about 931 GB? The answer is KB vs KiB: two ways of counting the same bytes.
What Your Photos Reveal: EXIF Metadata and Photo Privacy
Your photos carry more than the picture: hidden EXIF data can record when, where, and on what device a shot was taken.