Duplicate pages for an article

by kiasati   Last Updated September 11, 2017 14:10 PM

there are some articles with 2 or more urls. like this:

1. /essays/technical-essays/180-technologies/247-megapixel
2. /essays/technical-essays/247-megapixel
3. /essays/technical-essays/technologies/247-megapixel
4. /essays/technical-essays/technologies/247-

what is this? why this happens? url number 3 is the right one.

why the url number 4 happens? there are a lot like this one.

google consule refers to this as "Duplicate title tags"

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