Webmaster tools errors after site scan ?
I recently just completed my level 5 training, and as part of that i recently just set up my webmaster tools account.
Upon submitting my sitemap and doing the site scan, the result said a had a couple of warnings/ errors which includes titles being too long and absence of alt txt.
In the bid of trying to resolve them, watching the alt txt trainings etc, I seem to have caused more issues as the errors are now way more than they were before
I think i might have done the alt txt thing incorrectly, also for the long titles, some of these posts have already being indexed, i believe we are encouraged not to change urls right so how do i go about these