Ruy Lopez Opening, PDF, Chess Openings

This is a page from the book, Modern Chess Openings. How do I read and fully utilize these information? I cannot decipher how to use the table below. Thank you 🙂

Navigating the Ruy Lopez Vol.2

E book chess-openings. Aperturas de Ajedrez

Chess Opening Basics: Ruy Lopez, Cozio Defense - Chessable Blog

Ruy Lopez Exchange Variation –

The Ruy Lopez – Chess Openings For Beginners

Easy Guide to Ruy Lopez : John Emms : Free Download, Borrow, and Streaming : Internet Archive

Chess Openings by Example: English Opening on Apple Books

Chess Openings For White PDF Free

Chess Openings For Dummies - By James Eade (paperback) : Target

Download Chess: The Complete Beginner's Guide to Playing Chess: Chess Openings, Endgame and Important Strategies PDF

Monograph C78 Ruy Lopez by Beliavsky & Mikhalchishin - Chess Store

Vintage Allan Troy Chess Book-Modern Chess Openings-11 2/3 The Queen's Gambit

Chess - Ruy Lopez Opening - Apps on Google Play