PetetKsfo

Once I log into my RentMasseur profile (after having previously logged out) it will show the green light as "now" indicating I am online now, even without setting the "available now" indicator, and it will set the last log in time as the current moment when I log in.
If I close the browser without logging off, it will change my green light to grey, and will show the last time online as the time I closed my browser, and will retain the date/time when I logged in earlier.
If I come back later and reopen the site in my browser after having not logged out the previously time, I get back into my account without having to log in, and the green light will reignite showing my new time online, but it will not reset the last log in time, as I didn't log out the last time.     As JamesB pointed out, that makes the last log in time not very useful.
If I log in and set the "available now" indicator for 6 hours,  it will retain my green light and my "available now" status for the 6-hour duration, even if I log out and/or close the browser.
If someone sends me a message through the app, even if I have logged out and/or closed the browser, I will get a notification to my phone and I can reopen the browser to respond to the client message.    I had to be a "real" message typed by a client  though for the notification to come through.   If someone merely  checked out my profile and the system sent me an automated notification of the profile view, it will not ping me, but I will see that notification when I open the app again and check out my profile.
At the end of the six hour duration, or whatever amount of time I set for the "available now" - the green light will go back to grey and will again pick up my new last online time.
 
 

I can set my status to "available"  "not-available" or "not set".
"Not set" is the default setting if  I am offline.
Once I log on, the setting changes to green and shows as "available"
I can also manually set myself as "available" so even if I am not right at the computer but cooking or doing laundry or something, I can keep the "available" light on for up to 6 hours.
If I know that I have a client booked in the afternoon, or if I am not available at all for a day because I have some other plans, I can change the setting to show as "not available"  - either for a number of hours, for a day, or a week - in order to not waste your time if you are looking for something right now.
So I would say that if you see a "not available" - it means the person is not available right now, or probably not for the next few hours, but may be available later or the next day.
Peter