In this post Dan Stone (product manager Google) and Sophie Finck (SMB Global Product Lead) clearly defined accelerate re-marketing with Google Analytics. Mr. stone explained accelerate re-marketing with a live demo that how Accelerate re marketing is easiest and fastest way to get your GA customer on Remarketing without retagging!
Remember: For setting up a remarketing your analytics account must be linked with your your Google Adwords account.
Remarketing Lists for Search Ads (also known as RLSA) available using Remarketing with Google Analytics, so you can use the same audiences across your display and search campaigns. For more details, check out: Remarketing lists for search ads