What is the best way to market an online store without paying?

it has to be mix of Social media marketing, content marketing, affiliate marketing, email marketing and SEO

Using social media channels such as Facebook, Tweeter and Instagram is the first way to go specially if you are targeting younger consumers and millennials . If you are targeting older generation who does not use much technology then the word of mouth is your best bet.

Top 5 

- YouTube

- Instagram

- Twitter

- Facebook

-Snapchat

And this is in my opinion is how they should in that ordr 

POST relevent articles to the targeted audiences and more focus of SEO.

Best way is having a great value presented to your customer so that they would automatically market for your store using the word of mouth (strongest method). Furthermore, you can have an active social media presence on the most used platforms (Instagram, Facebook, Twitter, etc...)

Finally, as an owner of the store, you should market for yourself amongst your social circle.

You can promote your bussines without paying a lot if you go with content marketing route , it is the most effecient way of Digital Marketing and it builds trust between your store and potential customers , I use Content marketing institute website as a guide to develop content marketing strategies for my clients  , it has the most comperhensive resources on the web about this topis: 

https://contentmarketinginstitute.com/2016/01/checklists-templates-guides/

Sharing their website on social media.

Market through social networks like facebook, whatsapp, instagram and mouth publicity too helps

THE BEST OPTION TO SELL ONLINE PORTALS WITHOUT PAYING IS TO STRATEGIES ON THE PACKAGING THROUGHOUT SOCIAL MEDIA PLATFORMS LIKE FACEBOOK, INSTAGRAM, WHATSAPP GROUPS BY TAGGING FRIENDS AND ON LIVE COVERAGE ON SOCIAL PLATFORMS. HOWEVER, YOU CAN ALSO BE DOING THAT ON CREATING CHANNEL OR LINK ESPECIALLY ON FACEBOOK.  

Start within your own network and get people you personally know to share content related to your store, once you've done that, enter communities which are relevant to your store or product and continue to share content there. People will share your content and if it is good enough, it should go viral and you'll see many visitors to your store.

The best way to execute is with Facebook and Twitter.

Through Social Media Marketing and seclect limited customers