This post will walk you through how to root your Tecno w3 with PC. As at the time of writing this post, research revealed that there is no known android app yet to root Android 6.0 Marshmallow- the MTK processors. The likes of king root and frama root have been used to easily root the previous Android versions of MTK processors.
Now, considering Tecno W3, which is one of the mid-range and most affordable smartphones from the stable of Tecno-Mobile. The phone was launched in April 2016 with lower specifications compared with Tecno W4.
Owing to the fact that it runs a more recent Android version, it requires more than the usual android apps, but with the use of appropriate Softwares/drivers via your PC.
It is highly recommended that you know some facts about rooting before you proceed.