Algorithms: A search algorithm is a diagnostic means that takes a puzzle (when there is a search with a particular keyword), sorts through a record that contains cataloged keywords and the URLs that have relevancy with those keywords, estimates some probable answers, and then reverts pages that have the word or phrase that was looked for, either in the body content or in a URL that directs to the page. Three search algorithms are there – On-site, Off-site, and Whole-site algorithms.
Off page SEO: This type of SEO focuses on all of the activity that takes place "off the page" when looking to optimize your website. "What activity not on my own website could affect my ranking?" You might ask. The answer is inbound links, also known as backlinks. The number of publishers that link to you, and the relative "authority" of those publishers, affect how highly you rank for the keywords you care about. By networking with other publishers, writing guest posts on these websites (and linking back to your website), and generating external attention, you can earn the backlinks you need to move your website up on all the right SERPs.
If you do decide to go with a blog though, please, for all of our sakes, do not start a marketing blog. The Internet is littered with unhelpful marketing blogs by novice marketers. Starting one will be discouraging to you since it’ll be much harder to get traffic, and you’ll be writing about things you know nothing about, so please, don’t start a marketing blog.
As for what should your sandbox be, you have a few options. The easiest is to start a blog. That’s what this site was started as: a sandbox for learning content marketing, and it only became my full-time job on accident. A blog is a perfect sandbox for learning digital marketing since you can test almost all of the tactics on it, it’s low-cost, and you’ll improve your writing in the process.