Core Website Are Those websites That are Developed With PHP, JS, CSS, And Other Languages According To Your Needs And Business Goals. They Contain Functionality According To Your Desire And are Less In Size Compared To The WordPress. They Have a Unique In Design And You Don't Need Any Extra Plugin To Control And Extend Their Functionality. But WordPress is A Universal CMS That You Can Use To Create Any Type of Website. But Its Size Is Heavy And It Contains Many Unwanted Features That Slows Your Website To Extend Your Functionality, You Have To Add Plugins And Themes In It.