Hi there is an existing search plugin for EasySocial? I see that there in EasyBlog and EasyDiscuss.
What will be happen if I’ll delete indexed contentment in smart search (in backend)?You are referring to 'clear index' correct(https://take.ms/xoTQ9)? If that's the case, then it means you are deleting all finder search results.
Users will not able to find anything in in “ES search” menu item? So search will not work?If you are referring to the 'basic search' menu item, then yes deleting all smart search indexes will affect the search results under this menu item because this search uses smart search.
Or Ajax search will not work only in “ES search module”? But common ES search will work?I'm not sure what you mean by 'common ES search'. There is only smart search and advanced search in ES.