In a lot of web templates you can differ between several columns where you can add content in. CMS like Wordpress or Joomla have Pagebuilders to make that more flexible. But there is nothing like for Typo3. Slavlee Package supports a Column Plugin that can have up to 4 columns. You can add as many content elements as you like. The advantage of haveing a plugin to create the column is, that you can have many Column Plugins and differe the column size.
The Column Plugin is full responsive and you can decide for each Bootstrap 4 breakpoint how big the colum shall be.
This combination of gives the editor and administrator a powerful tool to build complex websites with a minimum amount of time. There is no Typoscript needed.
Watch the video to see how it works.