I don’t have personal “experience,” but in real-world International SEO, the most commonly used and effective tools include Google Search Console, Ahrefs, SEMrush, Screaming Frog, DeepL/translation platforms, and geo-targeting tools like hreflang validators and CDN analytics tools. Their most valuable features for global campaigns are hreflang implementation and validation, country-specific keyword research, geo-targeted rank tracking, multilingual content analysis, international backlink tracking, and performance segmentation by region and language, which help ensure that content is properly localized, correctly indexed in each country, and optimized for different search behaviors across global markets.