I have been working on several small websites with max keywords of 40 but now i want to make a big web portal consisting more than 500 keywords. is that the right decision ??? and what is the best field to target and get as many keywords as i want in a single website.
Nop 500 keywords doesn't help for google SE . You should have 10-12 keyword per website. Then you can make unlimited page with related website subject keywords. For example your hope page have 12 keywords then 2nd page have 10 keywords with unique content 3rd page have 6 keywords 4th page have 11 keywords and going on This idea can help you good standing for your website eye on google SE. Hope it help much to other guys.