If you are using QGIS for digitizing work, you have probably seen the 2.14 Changelog entry for Trace Digitizing. The main reason why this is a really cool new feature is that it speeds up digitizing a lot. When tracing is enabled, the digitizing tools take care to follow existing features (as configured in the snapping options). For a detailed howto and videos check Lutra’s blog.
Fantastic new autotrace digitizing function for #qgis 2.14 which we helped fund 
https://t.co/5SnAqbapEA
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James Rutter (@Chobhamonian) March 01, 2016
https://t.co/5SnAqbapEA—
James Rutter (@Chobhamonian) March 01, 2016
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