Loyde theme demos have been built using WPBakery Page Builder.
WordPress page builders offer possibility to create, edit, and customize website pages and posts without much (or any) coding knowledge.
WPBakery Page Builder is a very mature product and one of the most well-known drag-and-drop page building plugins on the market.
While there’s a bit of a learning curve to get used to how it works, WPBakery Page Builder is relatively easy to use, and will save you a lot of time.
Loyde comes with a number of custom WPBakery Page Builder elements, which can be used when building a page or a CPT post.