d’Viggo, you make a valid point, but I'm sure that even people who have just begun to dive into iOS development will know what Swift is (it's a programming language and also the most popular one for iOS development).
By itself without context, "swift" could mean fast, clean, or quick -- but in writing about code, people also use it as a pun -- as the author wrote in the story's subtitle,
"Useful Extensions to make your development process swifter."
Here, "swifter" can be interpreted multiple ways:
> more like the Swift language
> faster, cleaner, quicker
And whichever way you choose to read it, it should make sense, at least for most people -- I'm sure that you don't need to be a nerd to understand...