SEO Audit Tools
There are plenty of tools that you can use to measure SEO. We are listing some of them. You can open them and see how they work and what information they can provide about your webpage.
DIGITAL MARKETING

seositecheckup.com
is a tool to create audit reports for websites as well as your competitors.
Screaming frog
is a tool used to validate the crawl ability of the website and assess the technical SEO factors.
Google Analytics
will give you data points as you will learn who is using your site, how they are finding it, where they are coming from, how much time they spend on your site & the nature of their visit.
Google Page Speed Insights
checks website loading speed Google Safe Browsing Security Check checks if the website for malicious code/viruses and if it is safe for browsing.
AHREFS Backlink Checker
checks the backlink quotient of the website
SERP Simulator
is a simulation tool that creates a SERP result of a website - of how it will look when it ranks.