1. Include a meta description on the page.
How to add meta descriptions article
2. The image file size should be the smallest possible
There is no way to shrink the image file size in Cascade. Image file size can be shrunk using software outside of Cascade.
Article on how to Save Sharp Images at Low File Sizes
Images larger than 1 MB issue in Siteimprove
3. Include key terms in the page name and keep it short
When adding the page name do not use terms like: and, or, but, it. The page name will be the URL of the page therefore keep it short.
4. Use headers and correct header order.
The title of the page is header 1 and that should only be the only one on a page.
Following numerical order, the headers should be included.
Inserting a header is done by highlighting the header then going into Format --> Formats --> Headings
Headings are not structured correctly issue in Siteimprove
Other Resource
Naming Your Website and Webpages