- Objection.js is a SQL ORM that allows you to define models for tables using ES6 classes and define relationships between them. It uses Knex for building SQL queries and managing database schemas. - The presentation demonstrates how to install Objection.js and Knex, create database migrations to manage schema changes, define models and relationships, perform queries, add validation, and use plugins like Objection-GraphQL and Objection-Password. - The speaker also announces that they are launching their own consultancy called ANEPHENIX and will be available for contracting work beginning in mid-June.