Affiliates are new Avenue of earnings for many people. Affiliate works best in bringing sales for e-commerce sites and many other online portals.
Affiliates are reliable and work for many but you must be very choosy in selecting the best affiliate programs that will work for you.
As of now Amazon affiliate program is best. They not only provide good tracking information but alao are prompt in payment.
Flipkart is also good in tracking sales but very poor in payment. They hold payment for months without providing any reason.
You may find a lot of YouTube videos promising or telling you that you can earn millions through affiliate but that is not the case. Don't fall trap to such videos. Celebs and influencers who have good fan following are able to make good affiliate commission if they promote a product but the same is not possible for a beginner.
There is drawback in affiliate marketing that the e-commerce sites sometimes cancel the commission or even remove the tracked sales without reason leaving you high and dry. It takes a lot of effort to conclude a sale but you are always at the mercy of these portals.
Never depend on them as you primary source of income, just keep it as a side kick.
Members have already named tbe affiliates available and there are others which you can search on Google.
You must try to choose affiliate in which you are comfortable or have something related to your field of work only as that will make it easier for you to convert sales.
There are affiliate in financial products, travel packages, clothing, electronics, server and domain sale, e-commerce, etc.
If you belong to particular category then the same will be easier for you to work in.
There are already professionals and companies that are already working in this field for long and spend a huge amount to capture customers by offering them cashback, app, etc and for you to entice customer and convert a sale will be a hard job. Most sales will come from people known to you whom you will request to buy their product through link you shared etc., but the same is not possible on long run.
Do your homework before committing your time to affiliate income.
Live before you leave.