Hello,
Static block is used for “Electronic Components & Supplies” menu item – https://gyazo.com/7ff245b20ac4a574f281db97f8b3efc8
Watch these videos about the menu – https://youtu.be/7QluEYxznKs https://youtu.be/f07MBdnFPfk
https://xstore.helpscoutdocs.com/article/27-mega-menu
Regards