I'm also checking in that situations , maybe someone holds big pair and decide to get tricky , if you flopped a straight draw most of the time you're holding best hand.
i like to do a small raise here, for two reasons show a little stregnth so if you hit top pair with one of your cards you have a little info to know if your top pair is good, and to build up that pot a little so if u do hit or can now bluff the pot from your raise, you have a decent pot. and doing this all at a small risk and price