Language 
Imagine Google as a very fast librarian that can only understand a book through its structure, titles, and signals. If your book has no clear title, no readable index, and no organised chapters, it will end up buried very deep in the catalogue. On-page SEO is about making your page understandable for both search engines and readers.
Speak Google's Language
It's not black magic. It's order.
1. Title Tag and Meta Description
The blue title you see in search results. It is your site's advertisement. It must contain the keyword (what they search for) and a reason to click (benefit).
Bad: "Home Page - Mario Rossi Ltd"
Good: "Turnkey Renovations Milan | Quote in 24h - Mario Rossi"
2. Hierarchy (H1, H2, H3)
Use titles not for aesthetic size, but for logic.
H1: What the page is about (Only one!).
H2: Main concepts.
H3: Details.
Help Google understand the structure of your speech.
3. E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness)
Google rewards authority and real-world experience. In practice, it wants clear signals that there is a professional behind the content: who writes? Are they an expert? Is there an "About Us" page with real photos? Are there clear contacts? An anonymous site tends to underperform. Put your face on it.
4. Internal Links
Don't create dead ends. Every page must lead to another. From the blog article link the related service. From the service link the contacts. Create a web that keeps the user on the site.
SEO is Logic
If you help Google understand who you are, it will reward you by bringing you the right people. Don't look for strange tricks, look for clarity. A clear site for Google is a clear site for customers. Let's analyze your SEO.