Can anyone explain about lighting neutral wires (blue)?

I have a 3year old house, which has blue wires in the back boxes. I am assuming that this is the neutral. On my current 1 gang 2 way switch there is L1, L2 Common & earth.

If I were to fit a wifi light switch requiring a neutral connection, am I safe to connect these up as indicated, and please, can anyone explain in layman's terms how this works?

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    We need to know where in the world you are. In the UK and Europe blue is indeed neutral but, in the US and Australia, Blue can be an additional hot – Machavity Jul 25 '18 at 13:55
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    OP is in the Britverse or EU influenced world. 2-way means SPDT i.e. US 3-way. L1 and L2 are what we call travelers. – Harper - Reinstate Monica Jul 25 '18 at 15:16
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    Never match color to color, especially not in 2[3]-way circuits, double especially not in 2[3]way circuits, unless you fully understand the functions of each wire, and have colored electrical tape to mark them by function. Did I mention this is doubly so in 2[3]way circuits? – Harper - Reinstate Monica Jul 25 '18 at 15:19
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    In the UK gents. – Steve Bunnage Jul 26 '18 at 22:38

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