Plain rules on your headline, About, Experience roles, Skills and location, free with an account. Your profile score is the share of the checks made that your profile passes, every check counting the same. No AI reads your profile, and the result is not a prediction of what a recruiter will do.
Experience titles matter most. LinkedIn's recruiter search filters on the job titles in your Experience section, so your current roles are checked against the role you want, and one with the title is enough (with none current, the one that ended last). The title counts however it is spelt (Front-End or Frontend Developer). A nearby job does not count as it, so Project Coordinator is not Project Manager.
If you work through your own limited company, a current role of "Director" or "Owner" at your Ltd hides your work from those searches. Add each client engagement as its own role, titled with the work you did.
The skills check looks for skills your saved CV shows that your Skills list leaves out. When there are enough live adverts for the role, only the skills those adverts name count.
The visibility line counts the role's live UK adverts on companies' own job pages that use its title, with the number of adverts and the month. It shows only when there are enough adverts, from at least 3 companies. The phone line shows roughly where a phone cuts your headline in search results; the real cut depends on the device.
Step 1: paste your LinkedIn profile URL (on LinkedIn: Me, View profile, then copy the address from your browser's address bar) and tick that it is your own profile.
Step 2: the role you want, from your job preferences or your CV to start with, or a job advert: paste it, or a link to the job on the company's own site, and the checks use its title and type of work. Links to LinkedIn, Indeed, CV-Library and other job boards are not opened; paste the advert instead.
Fitread never logs in to LinkedIn or fetches anything from it. Your public profile is read for you by Mindcase, a profile data service, and only for your own profile; what it reads is used for that check only, then discarded. Nothing of your profile is stored. A one-way code of the link is kept for 24 hours, only to count how many different profiles an account reads.