"Widgets" is the menu section on your WordPress.
Click "Widgets" on the left side menu.
(Click "Appearance" first if the menu is closed).
You can select several widgets from here.
Drag and Drop "Pages" from the left section to the right section.
Place widgets to the "Blog sidebar" for blog pages, and place widgets to the "Page sidebar" for website pages.
Write "Title" for your WorPress page.
Change "Sort" from here.
You can exclude particular pages from here.
You can also input "Text".
Html is available.
You can put links for WordPress pages on the menu section.
You will see that widgets have inserted on the menu section.