Are HTML tables bad for SEO?
Q: What about tables on a website? Same as frames?
Frames are VERY negative from an SEO perspective because they break the site navigation. It's hard outside of frames for Google to figure out how pages relate to each other; frames creates a lot of orphaned pages.
HTML tables are not nearly as bad, as many many many sites still use them and they do not break the navigational system between pages. They have a small negative impact.
With HTML five and CSS sites are moving away from tables as a way to build sites, and new websites should avoid them - but they are nothing like the bad terrible things like FLASH, PDF, or FRAMES - not even close.
Hope this helps!
- Jason McDonald