The technology we have available today allows us to massively automate many tasks that had to be manually done only a few years ago. This has reduced the level of technical ability required for people do things like build their own websites, set up landing pages and build lists of subscribers. You can literally build a website within minutes today, even if you have zero technical computer skills.
When promoting affiliate offers, just make sure you are fully aware of all the terms and conditions attached to your affiliate program. Some programs can be strict about how they allow you to promote their products. For example, some may limit you to banner ads and links only, while others will allow you to use paid advertising, but won't allow email marketing.
If my piece of content is so unique and valuable around hiking backpack recommendations, that other reputable outdoor websites are willing to link to it and build the page’s authority, then I’d have a very real opportunity to rank high in organic search for these search terms (meaning, my page will come up first when someone searches for hiking backpacks).