How to perform Keyword Research for the e-commerce website which has more than 20,000 products

[CommercePundit]

Hello,
I want to work on keyword research for one of our e-commerce website - http://www.grandcrayon.ca which provides office supply products in canada. I am targeting only canada and keyword research will be based on Canada Search results.

I would like to know how i will start targeting keywords in organic way for this website. I am using keyword planner tool and get results some how. But should i start keyword research by filtering with different categories or any other easy way that i can give me the keyword results for this site.

I want to know which are the main keywords or the list of keywords on which i should work.

Your valuable inputs will help me a lot!

Thanks

[Martijn_Scheijbeler]

I would immediately start looking into any solutions that offer an API to make sure you can pull keywords at a fast pace for the 20k products that you offer. By doing this you can cross examine them to make sure you have all the right data sets to make good decisions.

[MattAntonino]

Start with Google Analytics and separate out by landing page - find out what you're already getting the most traffic on and start with those pages/keywords.

Then get some sort of crawl (Screaming Frog, personally) and start with the "levels" from home.  Start with homepage targeting, move out to the ones that are "1 level away" and then "2 levels from home."

Add that to your top selling products and categories around them - should get you started.

It's not going to be an easy go, just have to start and keep cranking through it.  Run each category through Adwords tool as well and you should get great lists to download & start from.

[imoney]

Absolutely agree. Dealing with 20k keywords is something that is almost impossible to do manually. In this case I would personally turn up to http://keywordtool.io/api. This is basically an API for Google autocomplete. I'd use the API to get first 10 results from Google autocomplete for every keyword. Usually the first 10 results from Google autocomplete are the most relevant keywords anyway.