The first thing to do is to join an affiliate program then select the products you intend to sell. The owners of the products would provide you with an affiliate code you can use for referring traffic to the main site. Also, you will be offered banners, text links and several forms of creative copies in which you just copy and paste the code on your own site to refer traffic. Any interested customer who clicks on the links from your website will be redirected to the main site where the product is sold and if they pay for the product or subscribe to a program/service and indicate you as the referral, you get a certain percentage as commission.
Affiliate Disclaimer – if you sign up for SiteGround with my affiliate link I will donate a good chunk at no expense to you. Each year I donate $3k to GoFundMe campaigns (2018 was to feed the hungry in Denver, 2017 was to Red Cross at Hurricane Harvey). Your support helps and I genuinely appreciate it. I try to make my reviews unbiased and backed by evidence in the form of Facebook polls, tweets, and real conversations. If you don’t want to use it, here’s a non-affiliate link to SiteGround. Either way I truly believe they are a stellar WordPress host and your site will run faster/smoother… do your research on Facebook groups + Twitter and you’ll find most people say the same.
Become an Amazon Associate and then use Keyword planner to find an in-demand niche: With more than a million different products to choose from and up to 10% commission the sales you drive, Amazon’s affiliate program is a great place to get started. Browse their available products and see what connects with you. Or take it a step further and use Google’s Keyword Planner to quickly do some keyword research and check how many people are searching for a specific term. With affiliate marketing, the more relevant traffic you can pull in, the more you’ll make off your site.
Clearly, there's a lot of demand on Amazon, and if any product is going to sell, it's going to sell well on Amazon. But the goal here is to source the right products that will easily sell at the world's largest online retailer. Generally, products between $10 and $50 sell very well here. Just be sure to do the right market research before jumping on this bandwagon.
You can find affiliate programs for everything from a fun cookbook, to a beauty or fashion item, to a financial product. Whatever your audience needs, you may be able to find an affiliate link for it. The beauty is that you are able to provide links to products that could really help to improve your readers’ lives, and you are able to earn a profit in the process.
If you're serious about making money online, start a blog. Blogging is one of the easiest and most sustainable income sources. As long as the blog is setup the right way, in the right niche, with the right content targeted at the right audience, and the offer is complementary to the content, you could make a tremendous amount of passive income from a blog.