More information needed what are you looking for? Any children? Where are you coming from? When?
If short distance with children I'd say absolutely but better in good weather.
Go to the zoo, Stanley Park, the sandcastle water park is great, treasure Island arcade, stay in Bispham eat fish and chips at the Bispham kitchen also loads of good restaurants and places to drink there (terra nostra Italian sunam Indian). Not fancy, cheap, good food. Walk on the prom. I like walking in North shore so Clevelys Fleetwood anchorsholme but also south shore at St Ann's end.
Poulton le fylde also lovely place to stay but not seaside like Bispham or St Ann's ; ditto lytham.
Centre of Blackpool and off the prom is not great. Avoid.
The tower is good. You can go to bits of it but as a visitor I'd go up it. We used to just do jungle jims soft play the crazy golf then always enjoy the free floor of comedy on the prom outside. I still love reading all the quotes.
Pleasure beach I don't go nowadays because a lot of the rides are old and I'm a huge theme park fan so alton towers is more my speed. There's a few good rides but I rate it as expensive for the quality. The big one would still be good fun. Kids would enjoyit