There are many factors that influence the positioning of the web and when hiring a professional SEO service, such as that offered by Web Design Costa Blanca, we have to take into account 2 aspects of SEO:

SEO On Page: Everything that is under our control and is on the website.
SEO Off Page: These are the external factors that are not under our direct control.
In addition to this there are 2 groups of tasks that must be carried out on a website and that can be carried out independently, being two differentiated activities within the same discipline. These are Active SEO and Passive SEO (they are little used terms). While a group of tasks consists of avoiding obstructing, the other tries to benefit, and to clarify a little more this, I will explain part of what we do about it.