To maintain economic growth in the long-run, especially on a per-capita basis, it is good for an economy to grow intensively—for example, by improvements in technology or organisation, thereby shifting the economy’s production possibilities frontier outward.
For sustained economic growth, especially when considering the average person's standard of living, it is advantageous for an economy to exhibit intensive development—through technological progress or organisational enhancements, which expands its capacity to produce goods and services.