Why First design walkthrough (URL shortener) in HLD? - Purpose & Use Cases

The Big Idea

What if sharing a long, messy link could be as easy as sending a tiny, perfect shortcut?

The Scenario

Imagine you want to share a very long website link with your friends by writing it down on a small piece of paper or sending it in a text message.

The link is so long and complicated that it's hard to copy correctly, and it takes up too much space.

The Problem

Manually copying or typing long URLs is slow and often leads to mistakes.

People might miss characters or add extra spaces, causing the link not to work.

It's also hard to remember or share these long links easily.

The Solution

A URL shortener automatically creates a tiny, easy-to-share link that redirects to the long original URL.

This makes sharing fast, error-free, and neat.

Before vs After

✗ Before

Send this link: https://www.example.com/articles/2024/06/very-long-article-title-with-many-words

✓ After

Send this link: https://short.ly/abc123

What It Enables

It enables quick, reliable sharing of links that fit anywhere, even in tiny spaces like tweets or SMS.

Real Life Example

When you share a YouTube video or a news article on social media, the URL shortener makes the link small and clean, so it looks nice and is easy to click.

Key Takeaways

Long URLs are hard to share and prone to errors.

Manual copying wastes time and causes mistakes.

URL shorteners create simple, reliable short links for easy sharing.