Definitions beginning with Y

YAML

Data serialization format often used for configuration files. It represents values, sequences and key-value mappings, with indentation contributing to structure. YAML syntax alone does not make a setting valid: the consuming software also defines accepted keys, types and rules.

Reference: YAML : Version 1.2.2 specification · Source consulted 2026-10-18

In practice: validate syntax, then check that the application accepts the intended settings. Watch indentation and values interpreted as numbers or booleans; keep secrets in an appropriate mechanism rather than a public file.

Yield management

Adjustment of prices or availability according to demand, capacity and timing to optimize revenue.

In practice: Check that pricing rules remain understandable and consistent for the customer.

YMYL

Your Money or Your Life: topics able to strongly affect health, safety, financial stability or people’s well-being.

In practice: Have consequential claims reviewed by a qualified person and state sources and limits.

YouTube SEO

Optimization of videos, titles, descriptions, chapters and audience signals to improve discovery and understanding on YouTube.

In practice: Ensure title, description, chapters and transcript truly describe the video.