Hi,
1) This is not a error, meta description should contain from 50 to 300 chars, anyway to change this you can edit file at /plugins/jsn/socialnetwork/app/View/Layout/default.ctp at the end of line 2
This is a template file so in alternative you can override this file by following these steps, override is the best way to change template file because with updates you will not loss these modifications:
- Access to Admin Panel (http://docs.easy-profile.com/index.php/article/social-network-configuration)
- Go to Theme Manager
- Choose "SocialNetwork Theme"
- Choose the file to override from left menu (Layout->default.ctp)
- Click on button "Copy"*** and copy it in "Blue Theme"
- Come back to Theme Manager and choose "Blue Theme"
- You will see your override to customize.

2) A good practice is to have URLs not too long, so we have made this limit. Anyway you can change it by editing file at /plugins/jsn/socialnetwork/app/Config/bootstrap at line 283 by changing from

function seoUrl( $string, $limit = 70 ) 

to

function seoUrl( $string, $limit = 120 ) 

3) Can you please explain me better? in your site I did not see AdSense code so we are not able to find the problem.

As above, my question number 3 has not been resolved. We have put AdSense code in head section but AdSense code is not working. Google Ads are not displaying. Kindly resolve this issue.

Hi,
unfortunately this not seems to come from our product, as you can see from the screenshot you get 403 error from Google AdSense. 403 mean forbidden, it is a common problem and mean that your site (your domain) does not have rights to show AdSense banners.

I found this guide that could be helpful: https://www.shoutmeloud.com/adsense-403-forbidden-error.html