Besides linking Adwords and Analytics you should also import Google Analytics metrics into Adwords (a great feature that few advertisers know of).

Log in to Google AdWords -> Click on the settings wheel at the top right -> Account settings -> Linked Accounts -> Google Analytics

Click “Add” next to the property that you are advertising in the Adwords account. Then click save.

Now go back to your AdWords campaign overview and click Columns -> Customize columns -> Google Analytics.

Click the arrows next to “bounce rate” and “avg. session duration (seconds)” to add the columns.

You can now view this data on a campaign, ad group and keyword level.

Bounce rate and avg. session duration are great performance indicators. In some cases you need hundreds of visitors to be able to generate one conversion (i.e. a lead or sale).

Using bounce rate and avg. session duration metrics you can often tell much faster whether a campaign, ad group or keyword will perform well.

You can then perform optimizations earlier without having to waste ad dollars while waiting to generate a conversion.