Hello friends,
Please tell me about Url Masking in Search Engine Optimization.
Thanks in advance.
You really need to ask a more specific question. Do some research first, and if there’s something you don’t understand, then ask about that. 
What ralph said…
This is far too vague a question, and a simple search should have sufficed to answer the question. Please search (both the forums and via your favorite search engine), and if you’ve still got SPECIFIC questions, please feel free to repost.
In the meantime, THREAD CLOSED.