Bouncepercentages

Bouncepercentages is a term used to describe the percentage of bounce events in a given context. The meaning varies by domain.

In email marketing, the bounce percentage is the proportion of messages that could not be delivered to recipients’ mailboxes. It is typically divided into hard bounces (permanent failures due to invalid addresses) and soft bounces (temporary issues such as full mailboxes). High bounce percentages harm sender reputations and overall deliverability. Causes include invalid addresses, domain blocks, full mailboxes, or temporary server problems. Reducing bounce percentages involves list hygiene, address verification, double opt-in processing, suppression of unresponsive addresses, and monitoring reputational feedback from mail providers.

In web analytics, bounce percentage, or bounce rate, measures the share of sessions in which a visitor views only a single page before leaving. It is calculated as the number of single-page sessions divided by total sessions, expressed as a percentage. High bounce rates can indicate misaligned expectations, low page relevance, or poor user experience; low rates suggest greater engagement. Context and traffic source should be considered when interpreting bounce percentages.

In physics and sports, bounce percentage refers to energy retention after a bounce. It is related to the coefficient of restitution, and can be estimated as the square root of the ratio of bounce height to drop height, or the ratio of velocities after and before impact. Measurements depend on surface material, temperature, and impact conditions. This usage is less common in everyday analytics.

Because bouncepercentages spans multiple domains, the term is not standardized. Users should specify the context, definition, and measurement method when reporting or comparing values.