A good online survey is defined by features that reduce friction for respondents and ensure high-quality data for the creator. The most critical features are (also called branching) and mobile responsiveness . Essential "Smart" Features

: Automatically skips irrelevant questions based on previous answers (e.g., skipping pet care questions if a user says they don't own a pet).

: A minimalist design with plenty of white space and large fonts (especially for older participants) improves focus.