Bleed, Slug, Spine and Margin

• Bleed
• the space beyond where the print will be trimmed.

Image Source:

https://blog.thepapermillstore.com/bleed-what-is-it-why-need-it/

• Slug
• the part of a URL which identifies a particular page on a website in an easy to read form.

• Spine
• a layout in which a main aisle is used for the movements between the work cells located on both side and for the temporary storage of work in process.

SOURCE:

https://www.quora.com/How-do-I-create-a-book-cover-spine-in-Adobe-InDesign-It-needs-to-be-between-1-4-and-1-2-inch-I-also-need-to-know-how-to-add-the-books-title-and-my-name-as-author-to-the-spine-so-it-reads-sideways-when-the-book-is-lying-flat

• Margin
•  the part of a page or sheet outside the main body of print or writing

SOURCE:
https://graphicdesign.stackexchange.com/questions/46606/applying-different-margins-slugs-to-different-pages

SOURCES:

https://www.merriam-webster.com/dictionary/margin

https://www.researchgate.net/publication/233350411_Spine_layout_design

https://yoast.com/slug/