Q: Is checking the terms of use of a website required when carrying out research as part of my work?
الجواب حامدا ومصليا ومسلما ومنه الصدق والصواب
A: If you are making commercial use of the website content then you must abide by the copyright restrictions as required by the copyright holder/copyright law. It is not permissible to breach the copyright restrictions, if any.
It is incumbent on the user to ensure that such restrictions are not breached and if this requires checking the terms of use then one must do so.