Dofollow และ Nofollow ลิงค์ต่างกันอย่างไร

Dofollow และ Nofollow ลิงค์ต่างกันอย่างไร Nofollow คือลิงค์ที่ใช้แท็ก rel=”nofollow” อยู่ในโค้ด HTML ที่ใช้สร้างลิงค์ แต่ลิงค์แบบ Dofollow ไม่มี



ซึ่งความแตกต่างในความหมายของ SEO ก็คือการที่เว็บมาสเตอร์อย่างพวกเราต้องการบอก Search Engine ว่าไม่ต้องตามลิ้งค์นี้ไปนะ หรือห้ามตามลิงค์นี้ ซึ่งการใช้งานเรานิยมที่จะใช้ในการบอกเจ้าตัวบอทที่ไตไปตามเว็บไซต์ของเราให้รู้ว่าเราไม่ต้องการให้บอทดังกล่าวให้ความสำคัญกับลิงค์ออกที่มีแท็ก Nofollow ติดอยู่ซึ่งทำให้เว็บมาสเตอร์นั้นสามารถควบคุมการเข้ามาของกูเกิลบอทและบอกกับบอทพวกนั้นว่า ไม่ต้องตามไปเก็บข้อมูลที่ลิ้งค์นี้ ด้วยการใส่แท็ก

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ซึ่งกูเกิลก็ออกมาบอกเองว่าพวกเขา(ระบบเก็บข้อมูลเว็บ)จะทำอย่างไรเมื่อพบลิงค์ที่มีแท็ก nofollow โดยกูเกิลก็บอกว่าพวกเขาก็จะไม่ตามไปเก็บข้อมูล ซึ่งการใช้งานลิงค์แบบ nofollow นั้นก็เพียงเพื่อที่จะบอกกับกูเกิลบอทเท่านั้นว่าไม่ให้ตามไปเก็บข้อมูลหน้านี้นะ แต่สำหรับยูเซอร์ หรือผู้ใช้งานนั้นไม่ได้รับผลกระทบใดๆ พวกเขายังสามารถคลิกตามเข้าไปดูลิงค์ได้ตามปกติ และ Search Engine แต่ละตัวก็มีการทำงานกับแท็กดังกล่าวที่แตกต่างกัน

Google ยังได้แนะนำเกี่ยวกับการใช้ลิงค์แบบ Nofollow พร้อมตัวอย่างการใช้งานว่าเคสไหนสมควรใช้งานลิงค์แบบ nofollow นี้โดยลิงค์ที่สมควรใช้งานลิงค์แบบ rel=”nofollow” ได้แก่

การลิงค์ไปยังเนื้อหาที่ไม่น่าไว้วางใจ เช่นการจัดการกับลิงค์ที่เกิดขึ้นโดยการใช้ช่องคอมเม้นต์ที่สามารถใส่ลิงค์ของผู้ที่มาคอมเม้นต์นั้นได้ ซึ่งเราไม่แน่ใจ หรือไม่ไว้ใจลิงค์ดังกล่าวว่าจะทำการลิงค์ไปยังเว็บที่อาจจะส่งผลกระทบต่อเว็บไซต์ของเราหรือเปล่าเช่นมีลิงค์ไปยังเว็บหลอกลวง หรือ เว็บที่เป็น สแปม เป็นต้นซึ่งอาจจะส่งผลกระทบต่อความน่าเชื่อถือของเว็บไซต์ของเราได้ ซึ่งการเปลี่ยนแผลงลิงค์ออกไปให้เป็นแบบ Nofollow นั้นจะช่วยลดความสนใจของเหล่า สแปมเมอร์ที่พยายามจะสร้างลิงค์จากการฝากลิงค์ตามคอมเม้นต์ดังกล่าวได้
ใช้ลิงค์แบบ Nofollow ในลิงค์ที่จ่ายเงินเพื่อเป็นการป้องกันการที่จะทำให้ Search Engine เข้าใจผิดเกี่ยวกับลิงค์ดังกล่าว โดยการทีเว็บไซต์สามารถอยู่อันดับดีๆได้ก็เพราะว่าบางส่วนนั้นเกิดจากการวิเคราะห์ลิงค์ที่ถูกส่งมายังหน้านั้นๆ ดังนั้นการส่งลิงค์ไปยังหน้าเว็บที่จ่ายเงินนั้นกูเกิลอาจจะมองว่าเข้าข่ายขายลิงค์ ซึ่งผิดกฏไกด์ไลน์ของกูเกิลได้ และอาจจะส่งผลกระทบกับอันดังของเว็บไซต์คุณแน่นอน มันคงไม่สนุกแน่กับการที่จะต้องทำเพื่อเงินไม่กี่บาท แต่กระทบกับเว็บไซต์ของคุณที่คุณดูแลมาอย่างดี
หน้าเว็บของคุณที่ไม่ต้องการให้บอทกูเกิลเก็บข้อมูล เช่นหน้าที่เป็นหน้าสมัครสมาชิก หรือหน้าที่คุณไม่ต้องการให้ค้นเจอในก็เกิล เวลาที่คุณจะส่งลิงค์ไปยังหน้าดังกล่าวแนะนำให้ใช้แท็ก Nofollow ในลิงค์ด้วยจะเหมาะสมกว่า
ข้อมูลด้านบนนั้นคือสิ่งที่กูเกิลออกมาบอกเราเกี่ยวกับการใช้งานลิงค์แบบ  Dofollow และ Nofollow ดังนั้นคำแนะนำจากผมนะ ลิงค์ที่ออกจากหน้าเว็บของคุณทั้งหมด แนะนำให้ใช้ลิงค์แบบ Nofollow ทั้งหมดไม่มีข้อยกเว้น ส่วนลิงค์ภายในเว็บไซต์ของคุณนั้นสำหรับหน้าที่คุณต้องการให้มีการส่งคะแนนคุณก็ทำแบบ Dofollow แต่หน้าเว็บที่ไม่ต้องการเพียงแค่ใส่แท็ก Nofollow เท่านี้คุณก็จะปลอดภัยจากปัญหาต่างๆแล้ว
และการสร้างลิงค์ต่างๆของคุณก็ให้ระวังให้มากเพราะว่าการมีลิงค์มาจากหน้าเว็บที่เป็น สแปมนั้นนอกจากจะไม่ส่งผลดีต่อเว็บไซต์ของคุณแล้วยังส่งผลเสียอย่างใหญ่หลวงอีกด้วยดังนั้นควรระมัดระวังให้ดี ผมทำเว็บเดี๋ยวนี้ไม่ได้เน้นที่สร้างลิงค์เหมือนเดิมอีกแล้ว ผมมาเน้นให้กับการสร้างคอนเท้นต์ที่ดีมากกว่า ดังนั้นถ้าคุณมรแนวทางในการทำ SEO อย่างไรมาแบ่งปันกันได้

อ้างอิง : https://support.google.com/webmasters/answer/96569?hl=en




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