All these terms (Breadcrumbs, Sidebars, Mega menus, Dropdowns, Tabs, and Accordions seem to be an important factor when creating sites and doing SEO, want to know if I am creating a site with WordPress, should consider including all of these or just select one or two of these and build site.
Example: If I choose to add Breadcrumbs and add more categories in the dropdown of Breadcrumbs, Should I still go for adding Menu and dropdowns inside it?
Similarly, if I choose to create Menu and add dropdowns inside, it's still good to create Breadcrumbs?
I am a bit confused, either I should go with one or both, as well as explain other navigation terms and how they're similar to these two, please? Thank you.