Steam is well-known gaming platform ,  Installing steam client in Ubuntu 17.04 is quite simple but here are simple step by step guide to install steam in Ubuntu 17.04 .

First Method

Download Steam Client from official site and install it

open steam homepagehttps://store.steampowered.com/about/ click on install steam

Install steam client

open steam client installer and install steam client

After installing click on dash and search for steam client

Wait while steam client is downloading and installing updates

Login with your steam credentials

Alternative Method

sudo apt-get install steam libc6-i386 libgl1-mesa-dri:i386

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Helpful links

1. steam homepage  : store.steampowered.com/about/
2. steam linux troubleshooting page : https://support.steampowered.com/kb_cat.php?id=97
3. ask ubuntu steam tagged questions https://askubuntu.com/questions/tagged/steam