Lets say I have a domain already, for example www.automobile4u.com (not mine), with a website fully running and all.The title of my Website says:  <title>Used cars - buy and sell your used cars here</title>Also, lets say I have fully SEO the website so when people searching for the term buy used cars, I end up on the second or first page.Now, I want to end up higher, so I go to the google adwords page where you can check how many searches are made on specific terms.Lets say the term used cars has 20 million searches each month.Here comes the question, could I just go and buy that domain with the search terms adress, in this case www.usedcars.com and make a redirect to my original page, and this way when people search for used cars, my newly bought domain name comes up redirecting people to my original website (www.automobile4u.com)?The reason I believe this benefits me is because it seems search engines first of all check website adresses matching the search, so the query used cars would automatically bring www.usedcars.com to the first result right?What are the downsides for this?I already know about google spiders not liking redirects, but there are many methods of redirecting...Is this a good idea generally?
Will having multiple domains improve my seo?
seo;google;domains
This won't do what you hope it will do. The redirect will effectively tell Google that URL no longer exists and has moved to your new URL. Plus since the new domain also won't have any links pointing to it it won't transfer any link love over either. The only positive it will have is you can use it as a shorter and more recognizable domain name which is good for users. And just having the keywords in the domain does not automatically rank you #1 (or even well at all) just because it matches the search term. The domain name is just one of many factors affecting how a page is ranked. It's very, very common to see pages with the exact domain of a search term not rank #1 simply because other pages have much better content. Better content = better rankings. Make that your mantra if you want to do well in the search engines.(BTW, if this really worked everyone would buy the domains of the keywords they want to rank well for. They don't do it because it doesn't work. If it did then the first person to buy all the domains wins. Plus it is too easy to manipulate this way. The easier it is to manipulate the less it is used in the ranking algorithm if it is even used at all).