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John Haas1,756 Points
What is the point of echoing the title tag? Why add in PHP for that?
Daniel Johnson104,132 Points
Don't think of websites as having each individual page title created manually. This is fine for smaller websites, but almost all pages of a modern web app are generated dynamically with reusable templates, and so you need to dynamically generate your title based on what page is loaded, what information should be displayed, and where in the title it should appear.
Unfortunately, the video you watched on Treehouse doesn't really give you a good example of how this works. They're using a reusable header template, but they're still not dynamically creating a unique title based on what page gets loaded. If you're not dynamically creating a title then you don't need to use code to create the title like they're doing in that video.
Later on in the course they show you how to change the title based on what page is loaded though.