The need to edit core files is a common occurrence in Joomla when you need to make certain changes to the layout and output on your website. A standard example is the Joomla Article page, because, by default, the article’s title is a H2, and needs to be changed into a H1 for SEO purposes.
Tags in K2 are a useful tool when you have a large amount of categories and/or items. They are similar to K2 Categories, but with a slightly different purpose. This article looks at the benefits of using Tags in K2, but also how to use and customise the Tag pages.