The document discusses the Uppsala model of internationalization, which proposes that firms gradually increase their international involvement and commitment through incremental adjustments. It occurs in stages as firms accumulate experiential knowledge of foreign markets to reduce uncertainty. The model has two aspects: state aspects like current market knowledge and commitment, and change aspects like decisions and activities that impact commitment over time. Firms progress from no regular exports to indirect exporting to foreign sales subsidiaries to foreign production. This gradual process is driven by increasing knowledge allowing firms to better identify opportunities and reduce risk through experience.