Custom elements in document heads can disrupt Google's rendering, potentially harming SEO; JSON-LD offers a flexible alternative. Using custom HTML tags in a web page's head can disrupt Google's ...

Whenever you have repeated HTML, you should be creating your own tag helpers to simplify your views. Here's how flexible tag helpers can be when you go to integrate them into your page.

My custom HtmlHelper wrote out a bunch of HTML elements (a fieldset, a label, a textbox and a div element to hold validation messages). I could create a custom tag helper that would do the same.