وفّر 50٪ من خلال الاشتراك السنوي في مجرة واحصل على تصفح لا محدود لأفضل محتوى عربي على الإنترنت.
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يسمح محرك البحث لرواد الإنترنت بالبحث عن كافة أنواع المحتوى على صفحات الويب المختلفة؛ مثل النصوص أو الصور أو مقاطع الفيديو أو الكتب الإلكترونية وغيرها من البيانات، وذلك من خلال إدخال كلمة أو عبارة مفتاحية تشير إلى موضوع البحث.
يُعد جوجل أشهر محركات البحث وأكثرها استخداماً على الإطلاق، حيث يستخدمه حوالي 92% من طالبي خدمات البحث. ومن المحركات الشهيرة أيضاً بينغ من مايكروسوفت، ومحرك داك داك جو (DuckDuckGo) الذي يركز على الخصوصية، ومحرك بايدو (Baidu) الصيني، ومحرك ياندكس (Yandex) الروسي.
يعتمد محرك البحث على مجموعة من البرامج التي تعمل معاً بشكل متناسق، حيث تقوم خوارزمية تعرف باسم الزاحف (Crawler) باستكشاف صفحات الويب من خلال تتبع الروابط التشعبية الموجودة في الصفحات المختلفة بدءاً من مجموعة روابط أولية "Seed" تُغطي المواقع الرئيسية. ثم يتم إنشاء فهرس ضخم أو قاعدة بيانات تضم ملايين الصفحات التي اكتشفها الزاحف. وعند البحث من خلال عبارة ما يتم قياس التشابه الدلالي بطرق مختلفة بين تلك العبارة والبيانات الموجودة في الفهرس، وإظهار النتائج على شكل قائمة مرتبة حسب درجة التشابه مع موضوع البحث.
للمزيد من التفاصيل حول كيفية عمل محركات البحث يمكنك الاطلاع على مقالتنا:
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