Problems inserting LinkedIn Widget

On my blog, I would like to add a widget to each post whereby the reader can then share it with their LinkedIn network if they so choose. I’ve gone to the LinkedIn site and got the code (see below). My question is do I need to manually insert the relevant linkage (i.e. articleUrl, articleTitle, articleSummary, and articleSource)or is there a way to have that insert automatically? Any insight appreciated.

https://www.linkedin.com/shareArticle?mini=true&url={articleUrl}&title={articleTitle}&summary={articleSummary}&source={articleSource}