Go Direst to Merchant Sites: Some merchants choose to handle its own affiliate sales and payments. For example, the Elegant themes affiliate program is run from their website. If you see a product that others are selling then the first place to visit is the merchants website. Most will have an affiliate link for more information on how to join their program.
This is my first comment on your blog and I am really impressed by the quality of the content! You said that Amazon is famous but it’s complex and I agree with you upon that. As a beginner, I don’t think it’s a good idea to join complex affiliate programs. I recently published an infographic about affiliate marketing sats (https://www.earnyfy.com/affiliate-marketing-stats-2016) amazon was not the list of top affiliate networks used by affiliate marketers. I think Clickbank is good for the beginner. And another I think liked is that telling people that it’s not as easy as it sounds. Most people think making money is really and when they know the truth they call it a scam and give up.
TOS stands for Terms of Service. In the affiliate world, this most often refers to the program terms of an affiliate program. The terms of service – sometimes also referred to as Terms of Use – tells you what the rules of the affiliate program are and sets out what you can and can't do. For example: The TOS may prevent affiliates from bidding on the merchant's brand keywords. If you then bid on those brand keywords, you'd be violating the TOS of the affiliate program and would likely be kicked out as a result.
Amazon is always a good choice for those looking to get into affiliate marketing. It is a well-known and trusted merchant and let's not forget they carry almost everything under the sun. Many of the cookies are only 24 hours and the commission is usually 1% to 10% depending on the product. But, people usually buy so much more than the one thing you are recommending. One holiday season, a person clicked on a link to a book I had mentioned on my site and bought a $1,900 engagement ring with it. At 7% commission on jewelry, that one sale earned me over $130. And I don't even promote jewelry! Amazon also pays a flat fee bounty on several of their verticals such as Amazon Video, baby registry, Audible, Prime and more.
The General Data Protection Regulation (GDPR), which took effect on May 25, 2018, is a set of regulations governing the use of personal data across the EU. This is forcing some affiliates to obtain user data through opt-in consent (updated privacy policies and cookie notices), even if they are not located in the European Union. This new regulation should also remind you to follow FTC guidelines and clearly disclose that you receive affiliate commissions from your recommendations. 
Another compelling aspect of affiliate marketing is that it lets you be creative, and provide something genuinely useful to your audience. Since you can use affiliate links pretty much anywhere, you can set up a review site, publish long-form articles, or even produce video content. Since you’re promoting other companies’ products, you don’t even need to worry about actually creating, shipping, and supporting the items yourself.
The General Data Protection Regulation (GDPR), which took effect on May 25, 2018, is a set of regulations governing the use of personal data across the EU. This is forcing some affiliates to obtain user data through opt-in consent (updated privacy policies and cookie notices), even if they are not located in the European Union. This new regulation should also remind you to follow FTC guidelines and clearly disclose that you receive affiliate commissions from your recommendations. 
Stands for Return on Advertising Spending, also shortened many times to Return on Ad Spend and can also be referred to as ROI. It refers to the amount of money made as a result of a specific advertising campaign. To find the ROAS of a campaign, you take the revenue divide it by the ad spend and multiply the result by 100. The result is presented in percentage form. Example – if you spent $200 to run a campaign and you made a gross profit of $600, you would take $600 (revenue) and divide it by $200 (ad spend) to get 3 and then multiply that by 100 to get 300 – displayed as a 300% ROAS. The amount over 100% using this method of calculation is your profit. In this example, that would mean you received a 200% profit on the campaign.
After being accepted into an affiliate program, marketers receive a unique URL that includes their affiliate ID. They share that unique URL with their subscribers, site visitors, and social networks via text links or ads. When someone clicks on that link, affiliate software records that click and any resulting product sales in the affiliate’s account. When commissions reach a pre-determined threshold, the affiliate is paid.
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