Keyword difficulty is a number that lets you know how difficult it will be to rank for a certain keyword. The higher the number, the more difficult it will be to rank on that keyword. There are a few sites online that will tell you keyword difficulty of a word or phrase. Record these numbers in your Excel document or Google Sheet that you made earlier.
An SEO technique is considered white hat if it conforms to the search engines' guidelines and involves no deception. As the search engine guidelines are not written as a series of rules or commandments, this is an important distinction to note. White hat SEO is not just about following guidelines, but is about ensuring that the content a search engine indexes and subsequently ranks is the same content a user will see. White hat advice is generally summed up as creating content for users, not for search engines, and then making that content easily accessible to the online "spider" algorithms, rather than attempting to trick the algorithm from its intended purpose. White hat SEO is in many ways similar to web development that promotes accessibility, although the two are not identical.
ALT tags are HTML elements used to specify alternative text to display when the element they are applied to (such as images) can’t be rendered. ALT tags can have a strong correlation with Google SEO rankings, so when you have images and other elements on your web pages, be sure to always use a descriptive ALT tag with targeted keywords for that page.