keyword for my website

Hi I'm new here.
I was reading a lot this and some other forums lately but still can't decide which keywords should i target.
I'm targeting people who are buying things on internet (my website will have shop reviews)

I found this keywords, but don't know if they're good and which one is the best.
-best buy company (6740 searches last month, 91.900results)
-best buy store (13669, 18300)
-where buy (1636, 22600)

Are this keywords good? Can anyone sugest some others please?
How can I know with which one will it be the easiest to come at top20?

And when I'm submitting to directories, should i write multi words phrases in quotes? " " " " or ' ' ' ' ? And should I add all phrases as 'keywords' or just one (best) of them?

Thank you for help! I'll be doing this thing first time and could really use a litlle help. thx!

Edit: Forgot to mentione that I won't be using adsense on my website.

 

"where buy" might be pretty hard IMO so the other 2 look like the best choices. Just my .02.

 

Now this gives me 271.000.000 results. Why do you think, I should trust your number?

 

Thank you!
What about some other keywords? I'm asking because I'm not very good in English, so I don't know wich keyword would people search.

Kaudo, I searched with quotes: "best buy company"

 

blabla, will you give us at least one item you plan to sell?

 

Yes, of course: hosting, domains, magazines, everything,..
I plan to advertise all kind of things.

Well here is my website but it isn't finished:
helpwithclick.com

One Question: Are people who are searching for 'best buy store' looking for website bestbuy.com or good stores??

thanks for helping!

 

people who search for best buy store are looking for the store imo.

It is pretty popular in the US, and probably therefore would make it very difficult to rank well against it.

Also i would really doubt that that many people actually search for "where buy"... It's not a coherent thought/sentence.

 

Blabla you are willing to master too broad topics.
What about the "gel seat pads"? Your fine, sure couple of hundreds clicks and sales monthly worth niche?

 

thanks to both for reply!
Now I don't have a single idea for my keywords.

I now this is very borad topic.

But acctualy the idea wasn't shop reviews but donating to charity with my website (so everybody wil go to my website before he would buy something, click on ads so i get % from affiliates which i give to charity).

That's why I need people which buy things on internet.
I don't belive many people buy gel sear pads on internet.

Probably the most of my traffic won't come from google but even few is better then nothing. That's why I need few keyphrases.