Nothing gated here. Read all three, use the free check on your own page, and only leave details if you want the written version and the consultation.
A crawler has to reach the page, render it and store it. Everything else is downstream of that, and most "we do not rank" problems die right here.
A stored page still has to be about something. Headings, internal links and structured data stop being decoration and start doing work.
Ten results, one click. This lesson is about the moment a person picks you over nine other pages that also answer the question.
If a word here is unfamiliar it is defined in the SEO glossary. Two public penalties and one problem we found on our own network are pulled apart in the case studies, and the longer pieces live in the library.