Dividers indicate changes in subject matter within the same page.
Containers bring emphasis to important content.
Title case, 2-3 words maximum.
Do not combine actions in a label (exception: "Customize & Buy").
If standard labels don't fit the button's purpose, align label with the task the user is attempting.
Please refer to the Dell Technologies branding website, https://brand.delltechnologies.com/faq/#voice, for further information regarding call-to-action labels and usage.
The W3C Web Accessibility Initiative (WAI) develops standards and support materials to help you understand and implement accessibility.
Please refer to these recommendations for separators from WAI-ARIA 1.1.
You may refer to this example of a separator (within a menubar) from WAI-ARIA practices 1.1.
You may also refer to these tutorials for page structure from Web Accessibility Tutorials.