Duplicate Content Issues

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Your same content in a different language does not equate to duplicate contentDetect search engines and strip out session ID’s and other things like click tracking IDs for them. (not a shady form of cloaking)Block possible session IDs with wildcards in robots.txtUse same parameter order in dynamic URLs or it causes duplicate content301’s take approximately 6-12 months for full effect in some search engines

PHP and Perl

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Hackers can hack a live session if the session URL gets indexed

Landing Page Optimization

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Landing page testing: test about 3-7 elements of an ad. Out of 100 ads only test about 8.PPC ads: URLs to subpages usually perform better than TLDsSegment different landing pages for different audiences: paid/organic/affiliate visitorsDon’t always give them exactly what they want on the landing page or they won’t be enticed to go further. (more…)