If I add more keyword for my website will it be a problem for seo ranking of the website.. Eg: if put around 100 keyword does it affect the ranking or other performance of the site
They will rank for each keyword; but the ranking will depend on the capacity of each keyword. Cheers.
have certain kw's that you want to rank. build authority and then you will auto rank for a bunch of other kw's
If you have pages for your keywords as per relevancy then it will good for your website. Your site will be rank by many keywords on search engine without building many backlinks because if you placed keywords on right pages then it will rank by relevancy and you will get targeted traffic and good page views.
If you have 100 keywords then created around 30 to 50 posts/pages on your site and target 2-3 keywords per page this would be good idea, I would say.
Rankings will depend on how optimised is each kw on onsite(in text, title, meta description) and offsite seo(anchor text)
Yes, if you add all those keywords your site will not rank high in the search engines. The idea is to use 1 to 3 keywords per each 100 words. If you use more than that it is called "keyword stuffing." The idea is not to overuse your keywords in your paragraphs, use them a little bit, not too much.