Hover over the portrait to learn more about the importance of a professional LinkedIn photo.
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Please note that in order to fully experience the interactivity of the code, you may need to save the code as an HTML file and open it in a web browser. Also, make sure to replace the `portrait.jpg` image source with the actual image file you want to use.
This code creates a simple webpage that showcases a professional portrait image and provides a caption with a link to learn more. The image and caption are styled using CSS, and the caption text changes when the user hovers over the image using JavaScript.